Compositions and Methods for Differential Release of 1-Methylcyclopropene

ABSTRACT

A clathrate of 1-methylcyclopropene with α-cyclodextrin, obtained as a solid particulate product, is modified by comminuting, classifying, or both to obtain a modified particulate. When subjected to identical atmospheric disgorgement conditions of humidity and temperature, identical masses of the modified and unmodified particulates exhibit different rates of 1-methylcyclopropene disgorgement. Specifically, we have found that a smaller mean particle size is inversely related to a greater rate of 1-methylcyclopropene release.

BACKGROUND

Exposure of living plant tissues to 1-methylcyclopropene (1-MCP) isknown to slow or even halt ripening or senescence thereof 1-MCP is anethylene antagonist and a gas at common ambient temperatures (boilingpoint reported as 4.7° C.). The gas can become affixed within ethylenereceptors on the surface of a living plant or a portion thereof(collectively, “living plant materials”), effectively blocking ethyleneinsertion while failing to trigger the biological response ofsenescence. For this reason, 1-MCP is useful as an anti-senescencetreatment for post-harvest preservation of ethylene-responsive freshvegetables and fruits, capable of slowing or even halting senescenceduring storage and transportation.

Daly et. al., U.S. Pat. Nos. 6,017,849 and 6,313,068 teach a clathrateof 1-methylcyclopropene with α-cyclodextrin with (“1-MCP/c/CD” or “1-MCPclathrate”). The 1-MCP gas complexes readily with α-cyclodextrin to forma crystalline solid that is easily collected as a powder. Thecrystalline character of the clathrate may be confirmed, for example, byx-ray diffraction analysis. The clathrate is disrupted by dissolution inliquid water, wherein disgorgement of 1-MCP from the clathrate isachieved by dissolving the 1-MCP clathrate in a large amount of liquidwater situated within a large volume containment, for example a silo,truck bed, warehouse, or another such storage facility where 1-MCP gascan be contained together with the living plant materials in order toachieve the anti-senescence treatment.

In addition to dissolution in liquid water, contacting the clathratewith sufficient water vapor and/or elevated temperatures also leads todisgorgement of 1-MCP from the clathrate. Neoh, T. L. et al.,Carbohydrate Research 345 (2010) 2085-2089; and Neoh, T. L. et al., J.Phys. Chem. B 2008, 112, 15914-15920 showed that humidity and heatrespectively bring about release of 1-MCP from the 1-MCP clathrate. AndKostansek, U.S. Pat. No. 6,548,448, showed that 1-MCP clathrate within apouch formed of polyvinylalcohol or low-density polyethylene, and sealedby edge-melting will release 1-MCP when the pouch is placed in ahigh-humidity environment.

Wood et al. teach in various embodiments that 1-MCP/c/CD may be blendedwith a carrier material and subsequently coated or printed on asubstrate, using conditions targeting avoidance of 1-MCP disgorgement.The coated substrate is then positioned proximal to living plantmaterial, where the humidity of biological respiration causes 1-MCPdisgorgement. The coated substrates may be configured near, within, orintegral to a packaging material or container, such as sheet wrapping,cartons, punnets, and the like where living plant tissue is packaged orwill be packaged. The water vapor proximal to the coated substrate, suchas that provided naturally by respiration of the living plant material,initiates the anti-senescence treatment.

Thus, for example, Wood et al., U.S. Pat. No. 8,414,989 and relatedcounterparts, which are incorporated by reference herein for allpurposes, teach that liquid α,β-unsaturated monomers and blends of suchmonomers are suitable carriers for a 1-MCP clathrate, wherein the liquidmonomers are mixed with the 1-MCP clathrate, then the mixture is coatedor printed followed by irradiating with electromagnetic irradiation. No1-MCP disgorgement is observed during the mixing, coating, or curing.

Wood et al., U.S. Pat. No. 9,320,288 and related counterparts, which areincorporated by reference herein for all purposes, teach thatlow-melting waxes such as petrolatum and similar materials are asuitable carriers for the 1-MCP clathrate, obtaining viscosities of e.g.30 cP or less at 80° C. to meet the requirements for flexographicprinting, and can be cooled to “set up” or solidify once printed,without curing. After printing, the printed substrate is covered with asecond layer to provide a laminate construction. The second layer may bethe same substrate as the first layer, or it may be different; forexample, the second layer may be a polymer coated and/or cured on top ofthe printed surface.

Even further, Wood et al., U.S. Pat. No. 9,421,793 and relatedcounterparts, incorporated by reference herein for all purposes, teachthat electrostatically printable particles—that is, toner particles—aresuitable carriers for electrostatically printing and affixing an imagecontaining the 1-MCP clathrate on a substrate, wherein the clathrate ismixed with or applied to an electrostatically printable particle whichfunctions as the carrier. Electrostatic printing of individualized 1-MCPclathrate-bearing package inserts or labels, for example based onweight, are enabled by conventional “toner cartridge” delivery.

According to the foregoing teachings, when 1-MCP/c/CD particulateembedded within a coated or printed carrier is located proximal toliving plant materials, diffusion of gaseous water vapor through thesubstrate/coating is sufficient to disrupt the clathrate, disgorging1-MCP gas which then diffuses back into the atmosphere proximal to theliving plant material where it can interact with an ethylene receptor.In each of these product formats, rate of 1-MCP disgorgement isdifferentiated by changing the physicochemical characteristics of thecarrier and/or substrate, or by selection of product constructions suchas laminated coatings and the like, or some combination of theseapproaches. Release of 1-MCP from the coatings depends not only ontemperature and humidity, but also on the rate of diffusion of watervapor into the coating and the rate of 1-MCP diffusion from thecoating/substrate—properties inherent to the coating/substrate and notthe clathrate itself.

Controlling the rate of disgorgement of 1-MCP from 1-MCP clathrateembedded in a coating therefore depends not only on ambient atmosphericconditions, but also on diffusion of sufficient water vapor into thecoating to disgorge 1-MCP from the embedded 1-MCP clathrate; and furtherstill on the rate of diffusion of the disgorged 1-MCP from the coatingto reach the living plant material.

It would be highly desirable to provide differential rate of 1-MCPdisgorgement from a 1-MCP clathrate, without the need to use a carrieror to obtain a coating having the 1-MCP clathrate incorporated therein.It would be highly desirable to provide differential rate of 1-MCPdisgorgement from a 1-MCP clathrate itself, without the need to use acarrier or to obtain a coating having the 1-MCP clathrate incorporatedin the coating. It would be highly desirable to provide coatings havinga 1-MCP clathrate incorporated therein, further wherein differentialrate of 1-MCP disgorgement from a 1-MCP clathrate does not requirereformulating the carrier, changing substrates, changing productconfiguration, or any combination of these.

It would be desirable from both the technical and manufacturingviewpoints to provide products capable of releasing 1-MCP at variablerates without the need to change the substrate or reformulate thecarrier employed to coat or print the 1-MCP/c/CD clathrate.

SUMMARY OF THE INVENTION

Described herein are methods, uses, and compositions related tomodifying the rate of disgorgement of 1-MCP from a 1-MCP/c/CD clathrate.The 1-MCP clathrate, obtained as a solid particulate product, ismodified to obtain a modified particulate. When subjected to identicalatmospheric conditions, further wherein the atmospheric conditions aredisgorgement conditions of humidity, temperature, pressure, identicalmasses of the modified and unmodified particulates exhibit differentrates of 1-MCP disgorgement. Specifically, we have found that a smallermean particle size is inversely related to a greater rate of 1-MCPrelease.

Thus, in first through fourth embodiments described herein, a 1-MCP/c/CDparticulate is modified by classifying, comminuting, or both comminutingand classifying to provide a modified particulate. First through fourthembodiments further includes blends of two or more modifiedparticulates, and blends of one or more modified particulate with anunmodified particulate. The modified particulates of first throughfourth embodiments are further suitably enclosed in a pouch, formingmodified particulate pouches of fifth embodiments. The modifiedparticulates of first through fourth embodiments are further suitablyaffixed to a substrate by coating a mixture of particulates and acarrier on a substrate, forming coated substrates of sixth embodimentsherein. The modified particulates of first through fourth embodiments,the modified particulate pouches of fifth embodiments, or the coatedsubstrates of sixth embodiments are subjected to disgorgement conditionsin seventh embodiments herein.

In first embodiments, the modifying comprises, consists essentially of,or consists of classifying. Classifying means separating a particulateproduct into two or more portions having different mean particle sizes,different median particle sizes, or different particle sizedistributions. In such first embodiments, a method comprises, consistsessentially of, or consists of classifying a particulate product to formtwo or more classified particulate portions. Some suitable methods ofclassifying include sieving or filtration, gravitational separation,fluidized bed separation, and combinations of these.

Further in first embodiments, a modified particulate compositioncomprises, consists essentially of, or consists of a classifiedparticulate, wherein the classified particulate is a first classifiedparticulate portion, a second classified particulate portion, oroptionally a third or a higher order classified particulate portion,further wherein each of the classified particulate portions is oneportion of a particulate product physically separated from the remainderthereof.

In second embodiments, the modifying comprises, consists essentially of,or consists of comminuting. Comminuting means physically reducing aparticle size of a particulate product to form a comminuted particulate.Some suitable methods of comminuting include grinding, fluidized bedmilling, jet milling, ultrasonic milling, ball milling, hammer milling,cryogenic milling, and combinations of these.

Further in second embodiments, the modified particulate comprises,consists essentially of, or consists of a comminuted particulate. Insuch second embodiments, the particulate product and the comminutedparticulate have one or more of: different mean particle sizes,different median particle sizes, and different particle size dispersity.

In third embodiments, the modifying comprises, consists essentially of,or consists of comminuting followed by classifying. In thirdembodiments, a method comprises, consists essentially of, or consists ofcomminuting a particulate product to form a comminuted particulate,followed by classifying the comminuted particulate to form two or morecomminuted classified particulates. In some third embodiments, thecomminuting and the classifying are accomplished in a single process. Inother such third embodiments, the comminuting and the classifying areaccomplished contemporaneously. In embodiments the method furtherincludes subjecting a comminuted classified particulate to disgorgementconditions.

Further in third embodiments, the modified particulate comprises,consists essentially of, or consists of a comminuted classifiedparticulate. The comminuted classified particulate is a first comminutedclassified particulate portion, a second comminuted classifiedparticulate portion, or optionally a third or a higher order comminutedclassified particulate portion, wherein each of the classifiedparticulate portions is one portion of a particulate product physicallyseparated from the remainder thereof.

In fourth embodiments, a method comprises, consists essentially of, orconsists of mixing two or more modified particulates, or mixing one ormore modified particulates with a particulate product to form a combinedmodified particulate. In embodiments the method further includessubjecting a combined modified particulate to disgorgement conditions.

Further in fourth embodiments, the modified particulate comprises,consists essentially of, or consists of a combined modified particulate.The combined modified particulate comprises, consists essentially of, orconsists of an admixture of two or more modified particulates, or anadmixture of one or more modified particulates with a particulateproduct. The combined modified particulate comprises a selected weightratio of two or more modified particulates, or of one or more modifiedparticulates with a particulate product (unmodified particulate). Theweight ratio of the two or more modified particulates, or of the one ormore modified particulates with a particulate product present in thecombined modified particulate is not limited, and is selected by anoperator to achieve a targeted rate of 1-MCP disgorgement when thecombined modified particulate is subjected to disgorgement conditions.In some fourth embodiments, by way of example, about 1 to 1000 parts byweight of a first modified particulate is admixed with about 1 to 1000parts by weight of a second modified particulate to form a combinedmodified particulate; in another example, about 1 to 1000 parts byweight of a modified particulate is admixed with 1 to 1000 parts byweight of an unmodified particulate to form a combined modifiedparticulate.

In fifth embodiments, a modified particulate according to one of thefirst through fourth embodiments above is incorporated within a pouch(also called an envelope or sachet) to form a modified particulatepouch. The modified particulate pouch of fifth embodiments comprises,consists essentially of, or consists of a pouch comprising an interiorvolume sealed to prevent the free exchange of the interior volume withatmospheric air; and a modified particulate disposed within the interiorvolume, further wherein the pouch is permeable to water vapor and to1-MCP gas. In fifth embodiments, the pouch comprises a thermoplasticsheet or film permeable to water vapor and to 1-MCP gas.

Thus, in fifth embodiments, a method includes forming a modifiedparticulate pouch by enclosing a modified particulate of one of thefirst through fourth embodiments above within the interior volume of apouch. Such methods may include contacting a modified particulate with athermoplastic sheet or film, the thermoplastic sheet or film permeableto water vapor and to 1-MCP gas; and configuring the thermoplastic sheetor film to form an interior volume surrounding the modified particulate,further wherein the interior volume is excluded from the free exchangewith atmospheric air. Methods of configuring are not particularlylimited by may include one or more of cutting, folding, crimping, heatbonding or heat sealing, stapling, and stitching.

In sixth embodiments, a method comprises, consists essentially of, orconsists of mixing a carrier with a modified particulate of any of thefirst through fourth embodiments to form a coating composition; coatingthe coating composition on a surface of a substrate; and affixing thecoated composition to the substrate to provide a coated substrate. Insome sixth embodiments, the coating composition further includes one ormore non-aqueous solvents. In sixth embodiments, the coating compositionincludes less than 5 wt % of water based on the weight of the coatingcomposition; in some embodiments the coating composition includes 2 wt %of water or less based on the weight of the coating composition. In somesixth embodiments one or more of the mixing, coating, or affixing isaccomplished in a continuous process; in some such embodiments, thecoating, and affixing are accomplished serially in a continuous process;in still other such embodiments mixing, coating, and affixing areaccomplished serially in a continuous process.

In sixth embodiments, the carrier comprises, consists essentially of, orconsists of: a polymer carrier, a polymerizable carrier, a wax carrier,or an electrostatically printable particulate carrier. The polymercarrier comprises, consists essentially of, or consists of one or morepolymers, that is, one or more compounds having two or more repeatingunits. In embodiments the coating composition comprising the polymercarrier further comprises one or more non-aqueous solvents. Thepolymerizable carrier comprises, consists essentially of, or consists ofone or more α,β-unsaturated monomers that are liquids within atemperature range of 0° C. to 50° C. at atmospheric pressure and arecapable of polymerization when irradiated with electromagneticradiation. The wax carrier comprises, consists essentially of, orconsists of one or more waxes. In some such embodiments, the wax carriercomprises, consists essentially of, or consists of a petrolatum or apetrolatum-like material. The electrostatically printable particulatecarrier comprises, consists essentially of, or consists of anelectrostatically printable particulate.

Additionally, combinations of the foregoing carriers or individualcomponents thereof are suitably mixed to form a coating composition.Non-limiting examples of such coating composition mixtures include apolymerizable carrier mixed with a wax or a polymer; a wax carrier mixedwith a non-aqueous solvent; and the like without limitation. Coatingcompositions as defined herein include any such coating compositionmixtures without limit. In some sixth embodiments, the coatingcomposition comprises less than 5 wt % of water based on the weight ofthe coating composition.

In sixth embodiments, mixing the carrier with a modified particulate toform a coating composition is accomplished by one more methodscomprising, consisting essentially of, or consisting of static mixingand mechanical mixing such as stirring, or a combination thereof. Insome such embodiments, mixing the carrier with the modified particulateto form a coating composition is accomplished at a temperature at orbelow about 80° C. Where a coating composition includes more than twocomponents, order of mixing the components is not limited except asrequired by the coating composition components and their interactions.For example, it may be advantageous to mix a polymer with a non-aqueoussolvent prior to mixing the modified particulate with thepolymer/solvent combination, in order to fully disperse or dissolve thepolymer in the solvent prior to mixing the modified particulate with thepolymer/solvent combination.

In sixth embodiments, a coating composition comprises, consistsessentially of, or consists of a carrier and a modified particulate ofany of first through fourth embodiments. In sixth embodiments, thecoating composition comprises about 5 wt % or less of water based on theweight of the coating composition. In some sixth embodiments, thecoating composition further includes a non-aqueous solvent. The amountof the modified particulate in the coating composition is selected bythe user without limitation; in some industrially useful embodiments,the coating composition comprises, consists essentially of, or consistsof about 0.01 wt % to about 50 wt % of the modified particulate based onthe weight of the coating composition.

In some sixth embodiments, the substrate comprises, consists essentiallyof, or consists of a thermoplastic sheet or film, or a woven or nonwovenfabric or paper. The substrate is defined by having at least one surfacethat is substantially planar and coatable using one or more industriallyuseful methods of coating selected from die coating, slot coating, brushcoating, spray coating, flood coating, curtain coating, screen printing,inkjet printing, gravure or reverse gravure coating, flexographicprinting, or electrostatic printing.

In sixth embodiments, the coating composition is coated on a substratesurface using one or more methods well known to those of skill in thecoating and/or printing industry, further wherein specific coatingmethodology is determined by the physicochemical properties of thecarrier. Coating the coating composition is carried out at a temperatureat or below about 80° C. Coating methods suitably employed to coat thecoating compositions include but are not limited to die coating, slotcoating, brush coating, spray coating, flood coating, screen printing,fluidized bed coating, inkjet printing, gravure or reverse gravurecoating, flexographic printing, electrostatic printing, and the like.Coating is continuous coating, which is coating of all or substantiallyall of a coatable substrate surface with the coating composition; ordiscontinuous coating, which is coating only a selected portion of thecoatable substrate surface with the coating composition.

In sixth embodiments, affixing the coating composition on the substratesurface is accomplished using one or more methods well known to those ofskill in the coating and/or printing industry, further wherein specificaffixing methodology is determined by the physicochemical properties ofthe carrier. In some such embodiments, affixing is carried out at atemperature at or below about 80° C. Affixing methods suitably employedto affix the coating compositions to the substrate surface includeevaporating (drying), irradiating, cooling, and applying heat andpressure. In sixth embodiments where the carrier includes a polymer anda non-aqueous solvent, affixing comprises or consists of evaporating thesolvent from the coated composition. In sixth embodiments where thecarrier includes one or more α,β-unsaturated monomers, affixingcomprises or consists of irradiating the coated composition withelectromagnetic radiation. In sixth embodiments where the carrierincludes a wax, affixing may include cooling the coated composition andin some embodiments additionally laminating the coated composition. Insixth embodiments where the carrier is an electrostatically printableparticulate, affixing mean applying heat and pressure to the coatedcomposition.

Accordingly, in sixth embodiments, affixing the coating composition tothe substrate results in a coated substrate. The coated substrates ofsixth embodiments comprise, consist essentially of, or consist of asubstrate having a coating affixed to at least a portion of a surfacethereof, wherein the coating comprises, consists essentially of, orconsists of a carrier and a modified particulate. The coating thicknessand coating weight of the coating are selected by the user in accordwith one or more commercially useful embodiments, further in accord withthe physicochemical properties of the carrier and the weight percent ofmodified particulate in the carrier. In some sixth embodiments, thecoating thickness is between 0.1 micron and 50 microns on all or aportion of the coated substrate surface. In some sixth embodiments, thecoating obtains a coating weight of between 0.1 and 100 g/m².

Seventh embodiments are methods of disgorging 1-MCP from the modifiedparticulate of first through fourth embodiments, the modifiedparticulate pouches of fifth embodiments, or the coated substrates ofsixth embodiments by subjecting the modified particulate of firstthrough sixth embodiments to disgorgement conditions.

Disgorgement conditions refer to the atmospheric conditions of ambientpressure (about 1 atm), temperature between 0° C. and about 50° C., andrelative humidity of about 80% to 100%. Disgorgement conditions of themodified particulates of first through fourth embodiments, pouches offifth embodiments, and coated substrates of sixth embodiments are thesame as disgorgement conditions for the (unmodified) particulateproducts previously reported in the art, including pouches andsubstrates having coatings comprising unmodified particulate products.When subjected to identical disgorgement conditions of humidity,temperature, and pressure, the modified and unmodified particulatesexhibit different rates of 1-MCP disgorgement. When subjected toidentical disgorgement conditions of humidity, temperature, andpressure, pouches or coated substrates comprising a modified particulateexhibit different rates of 1-MCP disgorgement from pouches or coatedsubstrates comprising the unmodified particulate.

While further presence of liquid water proximal to or even in contactwith the modified particulates of first through fourth embodiments,pouches of fifth embodiments, and coated substrates of sixth embodimentsis not excluded in the methods of the seventh embodiment, it is notnecessary to include or use liquid water to obtain disgorgement of1-MCP.

In some seventh embodiments, a portion of the water vapor contacting themodified particulates of first through fourth embodiments, pouches offifth embodiments, or coated substrates of sixth embodiments is suppliedby biological respiration of a living plant or portion thereof, whereinthe living plant or portion thereof is situated proximal to the modifiedparticulates of first through fourth embodiments, pouches of fifthembodiments, or coated substrates of sixth embodiments.

Other objects and features will be in part apparent and in part pointedout hereinafter.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a micrographic image of an unmodified particulate as describedherein.

FIG. 2 is a micrographic image of a modified particulate of theinvention.

FIG. 3 is a plot of 1-MCP concentration in a headspace as a function oftime, in accordance with the procedure of Example 3.

FIG. 4 is a plot of 1-MCP concentration in a headspace as a function oftime, in accordance with the procedure of Example 6.

FIG. 5 is a plot of percent 1-MCP released into a headspace as afunction of time, in accordance with the procedure of Example 11.

FIG. 6 is a plot of percent 1-MCP released into a headspace as afunction of time, in accordance with the procedure of Example 12.

Corresponding reference characters indicate corresponding partsthroughout the drawings.

DETAILED DESCRIPTION

Although the present disclosure provides references to preferredembodiments, persons skilled in the art will recognize that changes maybe made in form and detail without departing from the spirit and scopeof the invention. Various embodiments will be described in detail withreference to the drawings, wherein like reference numerals representlike parts and assemblies throughout the several views. Reference tovarious embodiments does not limit the scope of the claims attachedhereto. Additionally, any examples set forth in this specification arenot intended to be limiting and merely set forth some of the manypossible embodiments for the appended claims.

Definitions

Unless otherwise defined, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art. In case of conflict, the present document, includingdefinitions, will control. Preferred methods and materials are describedbelow, although methods and materials similar or equivalent to thosedescribed herein can be used in practice or testing of the presentinvention. All publications, patent applications, patents and otherreferences mentioned herein are incorporated by reference in theirentirety. The materials, methods, and examples disclosed herein areillustrative only and not intended to be limiting.

As used herein, “particulate” refers to a discrete group or mass ofparticles characterized by a particle size of 1000 microns or less.

As used herein, “particle size” refers to an average particle size, amedian particle size, a mean particle size, or a particle sizedispersity of a particulate, as specified or determined by context andfurther as such particle sizes are determined by a method of particlesize analysis known by those of ordinary skill in the art of analyzingparticles having dimensions of 1000 microns or less. Such methodsinclude light scattering analysis and Coulter counter methods, forexample. Unless specified otherwise, “particle size” generally refers toa volume-based average or method of measuring a volume-based averageassuming spherical particles. When comparing two or more particulates,differences in median particle sizes and/or other particle sizeparameters are determined based on the respective individuallydetermined median particle sizes and/or other specified parameters.

As used herein, “modified particulate” means a classified particulate, acomminuted particulate, a comminuted classified particulate, or acombined modified particulate. The unmodified source particulate fromwhich the modified particulate is derived may be referred to herein asthe “unmodified particulate” or the “particulate product” or othersimilar terms.

As used herein, the terms “classify”, “classified”, “classification” andlike terms refer to physically separating a particulate into two or moreportions that differ according to a particle size; and to theparticulate portions that result from the separating. Classifying aparticulate results in at least two classified particulate portions,wherein each classified particulate portion is characterized as having adifferent average particle size, mean particle size, or median particlesize.

As used herein, “comminute”, “comminuting” and like terms refer tomethods of reducing an average particle size of a particulate bymechanical methods such as grinding, milling, and the like.

As used herein, the term “substrate” means a solid article having atleast one surface capable of receiving a coating composition. Substratesare not particularly limited as to makeup, shape, or regardingparameters such as size or thickness. In embodiments, the substrate is athermoplastic sheet or film or a woven or nonwoven fabric or paper. Inembodiments, the substrate is disposed in a “web” format, that is,characterized by top and bottom major surfaces defining a thicknessbetween the major surfaces of about 10 microns to 1000 microns.

As used herein, the term “container” means a containment defining aninterior volume and sealed to exclude the free exchange of the interiorvolume with atmospheric air.

As used herein, a “pouch” is a containment that is permeable to watervapor and to 1-methylcyclopropene (1-MCP) gas.

As used herein, “permeable” as related to 1-methylcyclopropene gasindicates 1-MCP permeability of equal to or greater than 0.01(cm³·mm/m²·24 hrs·bar) at standard temperature and pressure (STP) and 0%relative humidity; and as related to water vapor indicates permeabilityof equal to or greater than 0.1 (g·mm/m²·24 hr) at 38° C. and 90%relative humidity, when measured according to ASTM D96. “Permeability”or “permeable” may refer to water vapor, 1-MCP, or both as determined bycontext.

As used herein, the term “disgorgement conditions” refers to atmosphericconditions proximal to a particulate. Such conditions include ambientpressure (typically about 1 atm), temperature between 0° C. and about50° C., and relative humidity between about 80% and 100%.

The terms “comprise(s),” “include(s),” “having,” “has,” “can,”“contain(s),” and variants thereof, as used herein, are intended to beopen-ended transitional phrases, terms, or words that do not precludethe possibility of additional acts or structures. The singular forms“a,” “and” and “the” include plural references unless the contextclearly dictates otherwise. The present disclosure also contemplatesother embodiments “comprising,” “consisting of” and “consistingessentially of,” the embodiments or elements presented herein, whetherexplicitly set forth or not.

As used herein, the term “optional” or “optionally” means that thesubsequently described event or circumstance may but need not occur, andthat the description includes instances where the event or circumstanceoccurs and instances in which it does not.

As used herein, the term “about” modifying, for example, the quantity ofan ingredient in a composition, concentration, volume, processtemperature, process time, yield, flow rate, pressure, and like values,and ranges thereof, employed in describing the embodiments of thedisclosure, refers to variation in the numerical quantity that canoccur, for example, through typical measuring and handling proceduresused for making compounds, compositions, concentrates or useformulations; through inadvertent error in these procedures; throughdifferences in the manufacture, source, or purity of starting materialsor ingredients used to carry out the methods, and like proximateconsiderations. The term “about” also encompasses amounts that differdue to aging of a formulation with a particular initial concentration ormixture, and amounts that differ due to mixing or processing aformulation with a particular initial concentration or mixture. Wheremodified by the term “about” the claims appended hereto includeequivalents to these quantities. Further, where “about” is employed todescribe a range of values, for example “about 1 to 5” the recitationmeans “1 to 5” and “about 1 to about 5” and “1 to about 5” and “about 1to 5” unless specifically limited by context.

As used herein, the term “substantially” means “consisting essentiallyof”, as that term is construed in U.S. patent law, and includes“consisting of” as that term is construed in U.S. patent law. Forexample, a solution that is “substantially free” of a specified compoundor material may be free of that compound or material, or may have aminor amount of that compound or material present, such as throughunintended contamination, side reactions, or incomplete purification. A“minor amount” may be a trace, an unmeasurable amount, an amount thatdoes not interfere with a value or property, or some other amount asprovided in context. A composition that has “substantially only” aprovided list of components may consist of only those components, orhave a trace amount of some other component present, or have one or moreadditional components that do not materially affect the properties ofthe composition. Additionally, “substantially” modifying, for example,the type or quantity of an ingredient in a composition, a property, ameasurable quantity, a method, a value, or a range, employed indescribing the embodiments of the disclosure, refers to a variation thatdoes not affect the overall recited composition, property, quantity,method, value, or range thereof in a manner that negates an intendedcomposition, property, quantity, method, value, or range. Where modifiedby the term “substantially” the claims appended hereto includeequivalents according to this definition.

As used herein, any recited ranges of values contemplate all valueswithin the range and are to be construed as support for claims recitingany sub-ranges having endpoints which are real number values within therecited range. By way of a hypothetical illustrative example, adisclosure in this specification of a range of from 1 to 5 shall beconsidered to support claims to any of the following ranges: 1-5; 1-4;1-3; 1-2; 2-5; 2-4; 2-3; 3-5; 3-4; and 4-5.

DISCUSSION

In any of the embodiments described herein, a particulate is suitablycharacterized by mean particle size, median particle size, mode size,specific surface area, diameter on cumulative, and one or more othersuch particle size parameters as suitably determined using analyticalmethods familiar to those of skill in measuring particle sizes in therange of 1 nm to 1000 μm. For purposes of consistency herein, referencesbelow to particle size generally, as well as more specific references tomean particle size, collectively refer to mean particle size as measuredby laser light analysis, such as by using a HORIBA LA-950 Laser ParticleSize Analyzer, available from Horiba Scientific, unless otherwisespecified or determined by context.

In any of the embodiments described herein, a “particulate product”means, refers to, or indicates a crystalline particulate form of theclathrate of 1-methylcyclopropene with α-cyclodextrin, as received, forexample from AgroFresh Inc. of Philadelphia, Pa.; or as obtained fromcontacting α-cyclodextrin with 1-methylcyclopropene gas according to aprocedure outlined in one or more of the following: U.S. Pat. Nos.8,580,140; 6,548,448; 6,017,849; and Neoh, T. Z. et al., J. Agric. FoodChem. 2007, 55, 11020-11026. Such particulate products are also referredto as “unmodified particulate” in embodiments below for context.

In any of the embodiments herein, an particulate product obtained inaccordance with the foregoing known methods is characterized by a meanparticle size between 30 μm and 100 μm, for example between 40 μm and 70μm or between 40 μm and 50 μm, a diameter on cumulative d10 ranging fromabout 5 μm to about 20 μm, a diameter on cumulative d50 ranging fromabout 30 μm to about 60 μm, a diameter on cumulative d90 ranging fromabout 60 μm to about 150 μm, or two or more thereof. Particles havingone or more dimensions of 300 μm to 500 μm have been observed bymicroscopic analysis of particulate products generated by one of theknown methods disclosed above.

The particulate products are further characterized as having asubstantially dry powder form, that is sufficiently dry and free ofimpurities that the does not disgorge 1-MCP when the particulate productis enclosed in a sealed container that is impermeable to water vapor,further wherein the temperature of the particulate product is maintainedbelow 90° C., preferably 80° C. or below, and more preferably 50° C. orbelow. Such particulate products consist of or consist essentially ofthe clathrate of 1-methylcyclopropene with α-cyclodextrin. A particulateproduct consisting essentially of the clathrate also includes freeα-cyclodextrin in an amount of up to about 15 wt % of the particulateproduct; and less than 1 ppm by weight of chlorinated impurities, whichare 1-chloromethylpropene and 3-chloromethylpropene.

Particulate products having the properties above are crystalline, and assynthesized obtain a mean particle size between 30 μm and 100 μm, oftenbetween 40 μm and 70 μm.

The particulate product includes an amount of 1-MCP trapped within thecrystalline clathrate wherein at least 85 wt % of the particulateproduct is 1-MCP clathrate and not α-cyclodextrin—that is, “empty”cyclodextrin. The quantity of 1-MCP in any particulate product ormodified particulate described herein is suitably determined using thegas chromatographic method described in Collaborative InternationalPesticides Analytical Council (CIPAC) Information Sheet Number 282.

FIG. 1 is a scanning electron micrograph of a representative particulateproduct. The particulate product of FIG. 1 has a mean particle size of46.2 μm, d10 11.1 μm, d50 40.2 μm, and d90 88.9 μm as determined bylaser light scattering analysis (HORIBA LA-950 Laser Particle SizeAnalyzer, available from Horiba Scientific of Edison, N.J.).

In first through fourth embodiments described herein, a particulateproduct as described above is modified by comminuting, classifying, orboth comminuting and classifying; and in some embodiments further mixingportions of particulates to provide a modified particulate. In fifthembodiments described herein, a modified particulate of any one of firstthrough fourth embodiments is enclosed in a pouch. In sixth embodimentsdescribed herein, a modified particulate of any one of first throughfourth embodiments is incorporated into a coating composition which iscoated on a substrate to obtain a coated substrate.

In seventh embodiments described herein, a modified particulate of anyone of first through fourth embodiments, a pouch of any of fifthembodiments, or a coated substrate of any of sixth embodiments issubjected to disgorgement conditions. When subjected to identicaldisgorgement conditions, a modified particulate of first, second, third,or fourth embodiments disgorges 1-MCP at a modified rate—that is, adifferent rate—when compared to the same mass of the unmodifiedparticulate. Thus, under identical disgorgement conditions, identicalmasses of 1-MCP/c/α-cyclodextrin clathrate particulates release 1-MCPgas at different rates, depending on particle size of the clathrateparticulate.

Further, we have determined that the relative rate of disgorgement of1-MCP from a modified particulate under disgorgement conditions isinversely related to the mean particle size of the modified particulate.Thus, decreasing the mean particle size of a 1-MCP/c/α-cyclodextrinclathrate particulate causes the rate of 1-MCP disgorgement to increaseunder identical disgorgement conditions. Further, in fifth embodiments,the foregoing finding applies to the modified particulates of firstthrough fourth embodiments enclosed in a pouch that is permeable towater vapor and to 1-MCP. Still further, in sixth embodiments, theforegoing finding applies to the modified particulates of first throughfourth embodiments when entrained (embedded, dispersed) in a coatingaffixed to a substrate.

First Embodiments

In first embodiments a particulate product is modified by classifying.Thus, in first embodiments, modifying comprises, consists essentiallyof, or consists of classifying. In such first embodiments, a methodcomprises, consists essentially of, or consists of classifying aparticulate product to form one or more classified particulate portions.Some suitable methods of classifying include sieving, gravitationalsedimentation or separation, fluidized bed separation includingcountercurrent flow separation, and combinations of these methods.

In some embodiments the classifying includes applying a force, such as acentral force (e.g. cyclonic or centrifugal methods); while in otherembodiments only gravitational force is applied (that is, 1 g). Inembodiments an applied force is 1.1 g to 10 g.

In embodiments, a first classified particulate portion is selected tohave a mean particle size that is different from the mean particle sizeof the unmodified particulate product. In some embodiments, second,third, or higher classified particulate portions are selected from asingle particulate product, wherein each of the classified particulateportions have a modified mean particle size, which means a particle sizethat is different from the mean particle size of the unmodifiedparticulate product.

The classifying is carried out in the absence of liquid water and underconditions of temperature and humidity that avoid disgorgement of 1-MCP.Such conditions include but are not limited to temperatures of less than90° C., preferably less than 80° C.; and relative humidity of 50% orless. In embodiments, one of skill may determine whether classifyingresults in disgorgement of 1-MCP by quantifying the amount of 1-MCP inthe particulate product and the classifying product using the procedureoutlined in Collaborative International Pesticides Analytical Council(CIPAC) Information Sheet Number 282, and comparing the amount of 1-MCPin each of the particulates. We have found that classifying a 1-MCPclathrate particulate in accordance with the methods disclosed hereindoes not lead to measurable loss of 1-MCP therefrom. Accordingly,modified particulates of first embodiments have the same, orsubstantially the same amount of 1-MCP as the particulate product.Stated differently, the methods of first embodiments do not lead to lossof 1-MCP gas from a 1-MCP clathrate of α-cyclodextrin.

In some first embodiments, a classified particulate is characterized ashaving a mean particle size that differs by at least 20% from the meanparticle size of the unmodified particulate. In some first embodiments,a classified particulate is characterized as having a mean particle sizethat is at least 20% and up to 200% greater the mean particle size ofthe unmodified particulate, for example 20% to 100% greater, or 20% to50% greater, or 50% to 100% greater, or 50% to 200% greater, or 100% to200% greater than the mean particle size of the unmodified particulate.In some first embodiments, a classified particulate is characterized ashaving a mean particle size that is at least 20% lower and up to 99.9%lower than the mean particle size of the unmodified particulate, forexample 20% to 95% lower, or 20% to 90% lower, or 20% to 80% lower, or20% to 70% lower, or 20% to 60% lower, or 20% to 50% lower, or 50% to99.9% lower, or 50% to 95% lower, or 50% to 90% lower, or 50% to 80%lower, or 50% to 70% lower, or 70% to 99.9% lower, or 70% to 95% lower,or 70% to 90% lower than the mean particle size of the unmodifiedparticulate. In embodiments, one or more classified particulate portionsare selected to have a specific mean particle size; such specific meanparticle size is about 1 μm, about 2 μm, about 3 μm, about 4 μm, about 5μm, about 6 μm, about 7 μm, about 8 μm, about 9 μm, about 10 μm, about11 μm, about 12 μm, about 13 μm, about 14 μm, about 15 μm, about 16 μm,about 17 μm, about 18 μm, about 19 μm, about 20 μm, about 21 μm, about22 μm, about 23 μm, about 24 μm, about 25 μm, about 26 μm, about 27 μm,about 28 μm, about 29 μm, about 30 μm, 30 μm to 35 μm, 35 μm to 40 μm,40 μm to 45 μm, 45 μm to 50 μm, 50 μm to 55 μm, 55 μm to 60 μm, 60 μm to65 μm, 65 μm to 70 μm, 70 μm to 75 μm, 75 μm to 80 μm, 80 μm to 85 μm,85 μm to 90 μm, 90 μm to 95 μm, 95 μm to 100 μm, or even greater than100 μm. In embodiments, one or more classified particulate portions areselected to have a mean particle size targeted in a range between 1 μmand 3 μm, between 2 μm and 4 μm, between 3 μm and 5 μm, between 4 μm and6 μm, between 5 μm and 7 μm, between 6 μm and 8 μm, between 7 μm and 9μm, between 8 μm and 10 μm, between 9 μm and 11 μm, between 10 μm and 12μm, between 11 μm and 13 μm, between 12 μm and 14 μm, or between 13 μmand 15 μm; or between 1 μm and 5 μm, between 5 μm and 10 μm, between 10μm and 15 μm, or between 15 μm and 20 μm; or between 1 μm and 10 μm,between 2 μm and 15 μm, between 2 μm and 10 μm, between 3 μm and 15 μm,between 3 μm and 14 μm, between 3 μm and 13 μm, between 3 μm and 12 μm,between 3 μm and 11 μm, between 3 μm and 10 μm, between 3 μm and 9 μm,between 3 μm and 8 μm, between 3 μm and 7 μm, or between 10 μm and 20μm.

To further illustrate the foregoing, in a nonlimiting example of firstembodiments herein, a particulate product is obtained from a supplierand characterized as having a mean particle size of 50 μm, diameter oncumulative d10 of 20 μm, diameter on cumulative d50 of 40 μm, anddiameter on cumulative d90 of 100 μm. Further in the representativeexample, the particulate product is classified using gravitationalseparation to obtain first, second, and third classified particulateportions. The first classified particulate portion is characterized ashaving a mean particle size of 5 μm, diameter on cumulative d10 of 2 μm,diameter on cumulative d50 of 4 μm, and diameter on cumulative d90 of 8μm; the second classified particulate portion is characterized as havinga mean particle size of 10 μm, diameter on cumulative d10 of 5 μm,diameter on cumulative d50 of 15 μm, and diameter on cumulative d90 of20 μm; and the third classified particulate is characterized as having amean particle size of 80 μm, diameter on cumulative d10 of 50 μm,diameter on cumulative d50 of 90 μm, and diameter on cumulative d90 of110 μm. Further in the foregoing representative embodiment, theunmodified (source) particulate and the first, second, and thirdclassified particulate portions selected therefrom are subjected toidentical disgorgement conditions of 1 atm, 20° C., 95% relativehumidity, whereupon first and second classified particulate portionsdisgorge 1-MCP faster than the unmodified particulate and the thirdclassified particulate portion disgorges 1-MCP at a slower rate than theunmodified particulate.

Other methods of classifying the particulate products, and additionalrepresentative examples will be readily apparent to one of skill in theart of classifying particulates. In embodiments, any such methods arelimited by excluding the addition of liquid water and excludingconditions wherein temperature exceeds 90° C., more preferably excludingconditions wherein temperature exceeds about 80° C. Such limitations arenecessary to avoid causing disgorgement of 1-MCP during the classifying.

Second Embodiments

In second embodiments a particulate product is modified by comminuting.Comminuting means reducing a particle size of a particulate productusing mechanical methodology. Thus, in second embodiments, modifying aparticulate product comprises, consists essentially of, or consists ofcomminuting the particulate product. Further in second embodiments, amodified particulate comprises, consists essentially of, or consists ofa comminuted particulate. The comminuted particulate is characterized ashaving a mean particle size that is less than the mean particle size ofthe unmodified particulate. In second embodiments, a comminutedparticulate is characterized as having a mean particle size that is atleast 20% less, and as much as 99.9% less than the mean particle size ofthe unmodified particulate, for example 25% to 99.9% less, or 30% to99.9% less, or 35% to 99.9% less, or 40% to 99.9% less, or 45% to 99.9%less, or 50% to 99.9% less, or 55% to 99.9% less, or 60% to 99.9% less,or 65% to 99.9% less, or 70% to 99.9% less, or 75% to 99.9% less, or 80%to 99.9% less, or 85% to 99.9% less, or 90% to 99.9% less, or 95% to99.9% less, or 96% to 99.9% less, or 97% to 99.9% less, or 98% to 99.9%less, or 99% to 99.9% less than the mean particle size of the unmodifiedparticulate.

Some suitable methods of comminuting include grinding, fluidized bedmilling, jet milling, ultrasonic milling, sand milling, bead milling,ball milling, hammer milling, cryogenic milling, and combinations ofthese. The comminuting is carried out in the absence of liquid water andunder conditions of temperature and humidity that avoid disgorgement of1-MCP. Such conditions include but are not limited to temperatures ofless than 90° C., preferably less than 80° C.; and relative humidity of50% or less. In embodiments, one of skill may determine whethercomminuting results in disgorgement of 1-MCP by quantifying the amountof 1-MCP in the particulate product and the comminuted product using theprocedure outlined in Collaborative International Pesticides AnalyticalCouncil (CIPAC) Information Sheet Number 282, and comparing the amountof 1-MCP in each of the particulates. We have found that one of skillcomminuting a 1-MCP clathrate particulate in accordance with the methodsdisclosed herein may easily avoid measurable loss of 1-MCP therefrom.Accordingly, modified particulates of second embodiments have the same,or substantially the same amount of 1-MCP as the particulate product.Stated differently, the methods of second embodiments do not lead toloss of 1-MCP gas from a 1-MCP clathrate of α-cyclodextrin.

In a representative but nonlimiting example of second embodimentsherein, a particulate product is synthesized according to the methodsdescribed in U.S. Pat. No. 8,580,140 and the synthesized product ischaracterized as having a mean particle size of 50 μm, diameter oncumulative dl 0 of 20 μm, diameter on cumulative d50 of 40 μm, anddiameter on cumulative d90 of 100 μm. Further in the representativeexample, the particulate product (unmodified particulate) is comminutedby jet milling to obtain a comminuted particulate characterized ashaving a mean particle size of 10 μm (that is, an 80% reduction inparticle size), diameter on cumulative d10 of 5 μm, diameter oncumulative d50 of 15 μm, and diameter on cumulative d90 of 20 μm.

Other methods of comminuting the particulate products, and additionalrepresentative examples will be readily apparent to one of skill in theart of comminuting particulates having dimensions of 1000 microns orless.

Third Embodiments

In third embodiments, the modifying comprises, consists essentially of,or consists of comminuting as described in second embodiments above,followed by classifying as described in first embodiments above. Inthird embodiments, a method comprises, consists essentially of, orconsists of comminuting a particulate product to form a comminutedparticulate, followed by classifying the comminuted particulate to formtwo or more comminuted classified particulate portions. In some thirdembodiments, comminuting is accomplished separately from classifying, inwhich one or more comminuted particulates are classified serially orbatchwise. In other third embodiments, the comminuting and theclassifying are accomplished in a single step or process, by comminutingwhile also collecting particulates having a desired particle size rangeas they are formed, while allowing larger particulates to be retainedfor further comminuting. In some such third embodiments, the comminutingis jet milling and the classifying is sieving (filtration type method).

Thus, in third embodiments, a modified particulate comprises, consistsessentially of, or consists of a comminuted classified particulate. Thecomminuted classified particulate is a first comminuted classifiedparticulate portion, a second comminuted classified particulate portion,or optionally a third or a higher order comminuted classifiedparticulate portion.

In embodiments, a first comminuted classified particulate portion isselected to have a mean particle size that is different from the meanparticle size of the comminuted particulate. In some embodiments,second, third, or higher comminuted classified particulate portions areselected from a single comminuted particulate, wherein each of thecomminuted classified particulate portions have a mean particle sizethat is different from the mean particle size of the comminutedparticulate.

In some third embodiments, any one comminuted classified particulateportion may be referred to in context as a comminuted classifiedparticulate. Thus, in third embodiments, a comminuted classifiedparticulate is characterized as having a mean particle size that differsby at least 20% from the mean particle size of the unmodifiedparticulate. In some third embodiments, a comminuted classifiedparticulate is characterized as having a mean particle size that is atleast 20% and up to 200% greater the mean particle size of theunmodified particulate, for example 20% to 100% greater, or 20% to 50%greater, or 50% to 100% greater, or 50% to 200% greater, or 100% to 200%greater than the mean particle size of the unmodified particulate. Insome third embodiments, a comminuted classified particulate ischaracterized as having a mean particle size that is at least 20% lowerand up to 99.9% lower than the mean particle size of the unmodifiedparticulate, for example 20% to 95% lower, or 20% to 90% lower, or 20%to 80% lower, or 20% to 70% lower, or 20% to 60% lower, or 20% to 50%lower, or 50% to 99.9% lower, or 50% to 95% lower, or 50% to 90% lower,or 50% to 80% lower, or 50% to 70% lower, or 70% to 99.9% lower, or 70%to 95% lower, or 70% to 90% lower than the mean particle size of theunmodified particulate.

In embodiments, a comminuted classified particulate is selected to havea specific mean particle size. Such specific mean particle size is about1 μm, about 2 μm, about 3 μm, about 4 μm, about 5 μm, about 6 μm, about7 μm, about 8 μm, about 9 μm, about 10 μm, about 11 μm, about 12 μm,about 13 μm, about 14 μm, about 15 μm, about 16 μm, about 17 μm, about18 μm, about 19 μm, about 20 μm, about 21 μm, about 22 μm, about 23 μm,about 24 μm, about 25 μm, about 26 μm, about 27 μm, about 28 μm, about29 μm, or about 30 μm. In embodiments, a comminuted classifiedparticulate is selected to have a mean particle size targeted in a rangebetween 1 μm and 3 μm, between 2 μm and 4 μm, between 3 μm and 5 μm,between 4 μm and 6 μm, between 5 μm and 7 μm, between 6 μm and 8 μm,between 7 μm and 9 μm, between 8 μm and 10 μm, between 9 μm and 11 μm,between 10 μm and 12 μm, between 11 μm and 13 μm, between 12 μm and 14μm, or between 13 μm and 15 μm; or between 1 μm and 5 μm, between 5 μmand 10 μm, between 10 μm and 15 μm, or between 15 μm and 20 μm; orbetween 1 μm and 10 μm, between 2 μm and 15 μm, between 2 μm and 10 μm,between 3 μm and 15 μm, between 3 μm and 14 μm, between 3 μm and 13 μm,between 3 μm and 12 μm, between 3 μm and 11 μm, between 3 μm and 10 μm,between 3 μm and 9 μm, between 3 μm and 8 μm, between 3 μm and 7 μm, orbetween 10 μm and 20 μM.

The comminuting and classifying methods of third embodiments are carriedout in the absence of liquid water and under conditions of temperatureand humidity that avoid disgorgement of 1-MCP. Such conditions includebut are not limited to those described for classifying in accordancewith first embodiments and comminuting in accordance with secondembodiments. We have found that one of skill comminuting and classifyinga 1-MCP clathrate particulate in accordance with the methods disclosedherein may easily avoid measurable loss of 1-MCP therefrom. Accordingly,modified particulates of third embodiments have the same, orsubstantially the same amount of 1-MCP as the particulate product.Stated differently, the methods of third embodiments do not lead to lossof 1-MCP gas from a 1-MCP clathrate of α-cyclodextrin.

Fourth Embodiments

In fourth embodiments, a method comprises, consists essentially of, orconsists of mixing two or more of the modified particulates of any offirst through third embodiments, or mixing one or more modifiedparticulates with an unmodified particulate to form a combined modifiedparticulate. Thus, in fourth embodiments, the modified particulatecomprises, consists essentially of, or consists of a combined modifiedparticulate. The combined modified particulate comprises, consistsessentially of, or consists of an admixture of two or more modifiedparticulates of first through third embodiments above, or an admixtureof one or more modified particulates of first through third embodimentsabove with an unmodified particulate.

The combined modified particulate is characterized by the mass ratio ofthe two or more modified particulates of the first through thirdembodiments, or of one or more modified particulates with an unmodifiedparticulate. The weight ratio of the two or more modified particulates,or of the one or more modified particulates with a particulate productpresent in the combined modified particulate is not limited, and isselected by an operator freely and without limitation to achieve atargeted rate of 1-MCP disgorgement under disgorgement conditions.

In some fourth embodiments, by way of example, about 1 part by weight ofa first modified particulate is admixed with about 1 to 1000 parts byweight of a second modified particulate to form a combined modifiedparticulate; in another example, about 1 to 1000 parts by weight of amodified particulate is admixed with 1 to 1000 parts by weight of anunmodified particulate to form a combined modified particulate. Suchcombinations are made freely and without limitation. In someembodiments, 1 part by weight of a first modified particulate is admixedwith 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8parts, 9 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70parts, 75 parts, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 200parts, 300 parts, 400 parts, 500 parts, 600 parts, 700 parts, 800 parts,900 parts, or 1000 parts of a second modified particulate to form acombined modified particulate. In some embodiments, 1 part by weight ofan unmodified particulate is admixed with 1 part, 2 parts, 3 parts, 4parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 15 parts,20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, 90parts, 95 parts, 100 parts, 200 parts, 300 parts, 400 parts, 500 parts,600 parts, 700 parts, 800 parts, 900 parts, or 1000 parts of a modifiedparticulate to form a combined modified particulate. In someembodiments, 1 part by weight of a modified particulate is admixed with1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75parts, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 200 parts, 300parts, 400 parts, 500 parts, 600 parts, 700 parts, 800 parts, 900 parts,or 1000 parts of an unmodified particulate to form a combined modifiedparticulate.

The combined modified particulate is admixed in the absence of liquidwater and under conditions of temperature and humidity that avoiddisgorgement of 1-MCP. Such conditions include but are not limited tothose described as suitable in first, second, or third embodimentsabove. Admixing the combined modified particulates is accomplished usingconditions that do not lead to loss of 1-MCP gas from a 1-MCP clathrateof α-cyclodextrin. Accordingly, the modified particulates of fourthembodiments include the same, or substantially the same amount of 1-MCPas the particulate product. Stated differently, the methods of fourthembodiments do not lead to loss of 1-MCP gas from a 1-MCP clathrate ofα-cyclodextrin.

We have found that the combined modified particulates of fourthembodiments are characterized by a rate of 1-MCP disgorgement that isrelated to the mass ratio of the combined particulates. Thus, in arepresentative but nonlimiting example of fourth embodiments herein, aparticulate product is obtained from a supplier and characterized ashaving a mean particle size of 50 μm. A portion of the particulateproduct (unmodified particulate) is set aside, and the rest iscomminuted by jet milling to obtain a comminuted particulatecharacterized as having a mean particle size of 10 μm. Then 1 g of thecomminuted particulate is admixed with 1 g of the unmodified particulateto form a combined modified particulate. Then 0.05 g of the comminutedparticulate, 0.05 g of the unmodified particulate, and 0.05 g of thecombined modified particulate are separately subjected to identicaldisgorgement conditions. The release rate of 1-MCP from the comminutedparticulate is faster than that of the combined modified particulate;and the release rate of 1-MCP from the combined modified particulate isfaster than that of the unmodified particulate.

Fifth Embodiments

In fifth embodiments, a modified particulate according to one of thefirst through fourth embodiments above is incorporated within a pouch(also called an envelope or sachet) to form a modified particulatepouch. The modified particulate pouch of fifth embodiments comprises,consists essentially of, or consists of a pouch comprising an interiorvolume sealed to prevent the free exchange of the interior volume withatmospheric air; and a modified particulate disposed within the interiorvolume, further wherein the pouch is permeable to water vapor and to1-MCP gas. In some fifth embodiments, the pouch comprises athermoplastic sheet or film permeable to water vapor and to 1-MCP gas.

In fifth embodiments herein, the permeable thermoplastic sheet or filmis characterized as having 1-MCP permeability of equal to or greaterthan 0.01 (cm³·mm/m² 0.24 hrs·bar) at standard temperature and pressure(STP) and 0% relative humidity; and water vapor permeability of equal toor greater than 0.1 (g·mm/m²·24 hr) at 38° C. and 90% relative humiditywhen measured according to ASTM D96. In fifth embodiments, the modifiedparticulate pouch suitably isolates the modified particulate from directcontact with a living plant material while still allowing for placementof the pouch proximal to the living plant material. Since thethermoplastic surrounding the modified particulate is permeable to watervapor and to 1-MCP, a modified particulate pouch placed proximal toliving plant material obtains disgorgement of 1-MCP therefrom to treatthe living plant material.

Thus, in fifth embodiments, a method includes forming a modifiedparticulate pouch by enclosing a modified particulate of one of thefirst through fourth embodiments above within the interior volume of apouch. In such embodiments suitable methods include selecting a mass ofa modified particulate; contacting the mass of modified particulate witha thermoplastic sheet or film, the thermoplastic sheet or film permeableto water vapor and to 1-MCP gas; and configuring the thermoplastic sheetor film to form a pouch defining an interior volume surrounding theselected mass of modified particulate, wherein the interior volume isexcluded from the free exchange with atmospheric air.

The amount of modified particulate in the modified particulate pouch isselected to target a type of living plant material and mass of theliving plant material to be treated by disgorgement of 1-MCP from themodified particulate. Living plant material to be treated can include,for example, a single living plant portion (e.g. a head of broccoli orlettuce) packaged for consumer use; a carton or stack of cartonsincluding living plant material within each carton (such as cartons ofmangoes or broccoli harvested in the field); or a truck bed, silo, orwarehouse including dozens, hundreds, even thousands of individualliving plants or plant portions.

Thermoplastic sheets and films useful in fifth embodiments arecharacterized as permeable to water and to 1-MCP in accord with definedpermeabilities herein. Suitable thermoplastic sheets and films includecommercially available “web” format sheet or film articles characterizedas having two major surfaces defining a thickness therebetween of about10 μm to 1 mm, such as 25 μm to 1 mm, or 50 μm to 1 mm, or 75 μm to 1mm, or 100 μm to 1 mm, or 125 μm to 1 mm, or 150 μm to 1 mm, or 200 μmto 1 mm, or 250 μm to 1 mm, or 500 μm to 1 mm, or 10 μm to 800 μm, or 10μm to 500 μm, or 10 μm to 400 μm, or 10 μm to 300 μm, or 10 μm to 200μm, or 10 μm to 100 μm, or 50 μm to 300 μm, or 50 μm to 200 μm, or 50 μmto 150 μm.

Suitable thermoplastics useful for making the pouches include films andsheets formed from polymeric compounds including but not limited topolyvinyl halides such as poly(vinyl chloride) (plasticized andunplasticized) and copolymers thereof; polyvinylidene halides such aspolyvinylidene chloride and copolymers thereof; polyolefins such aspolyethylene, polypropylene, copolymers thereof, and morphologicalvariations thereof including LLDPE, LDPE, HDPE, UHMWPE, metallocenepolymerized polypropylene, and the like; polyesters such as polyethyleneterephthalate (PET) or polylactic acid (PLA) and plasticized variationsthereof; polystyrene and copolymers thereof including HIPS; polyvinylalcohol and copolymers thereof; copolymers of ethylene and vinylacetate; and the like. Blends, alloys, composites, crosslinked versionsof the foregoing, and recycled versions thereof are also useful invarious embodiments. A thermoplastic film or sheet may be processed byorienting the film or sheet, such as by biaxially orienting the film orsheet. Thermoplastic coated nonwovens such as paper or cardboardextrusion coated with one of the foregoing thermoplastics are alsouseful in forming the pouches of fifth embodiments. Two or more layersof such thermoplastics are present in some embodiments as multilayerfilms or sheets.

The dimensions of the major surfaces of the thermoplastic sheets andfilms useful in fifth embodiments are not particularly limited and maybe selected from “sheets” which generally refer to major surfacedimensions of 1 meter or less in any direction; and “films” whichgenerally refer to roll type formats wherein the major surfaces arecharacterized by a width of about 2 cm to 2 m and a length of 10 m to 1km or even more. Films and sheets are suitably subjected to one or moreof die cutting, blade cutting, laser cutting, slicing, stamping,embossing, and the like as necessary to provide a suitable shape andconfiguration of the thermoplastic film or sheet for pouch formation.

The pouches of fifth embodiments are made in the absence of liquid waterand under conditions of temperature and humidity that avoid disgorgementof 1-MCP. Such conditions include but are not limited to temperatures ofless than 90° C., preferably less than 80° C.; and relative humidity of50% or less. Accordingly, the modified particulates disposed within theinterior volume of the pouches of fifth embodiments have the same, orsubstantially the same amount of 1-MCP as the particulate product.Stated differently, the methods of fifth embodiments do not lead to lossof 1-MCP gas from the modified particulate.

Methods of configuring the pouch are not particularly otherwise limitedand may include one or more of cutting, folding, crimping, heat bondingor heat sealing, stapling, and stitching and other related methods ofconfiguring thermoplastic materials to form pouch or envelope typecontainers sealed from the free exchange with the surroundingatmosphere. In some such embodiments, configuring includes but is notlimited to folding and heat sealing the edges of the thermoplastic sheetor film to surround a selected mass of modified particulate to form amodified particulate pouch. In some such embodiments, configuringincludes disposing a selected mass of modified particulate between twothermoplastic sheets or films, and heat sealing a perimeter around themodified particulate to form a modified particulate pouch.

In embodiments, the mass of modified particulate selected fordisposition within a pouch or for enclosing within a pouch is selectedby one of skill in determining the amount of 1-MCP needed for treatmentof a living plant material, further as limited in practicality by e.g.available equipment and/or thermoplastic sheet or film format forobtaining a desired pouch size, configuration, or format. Any amount ofa modified particulate may be selected by an operator in conjunctionwith the interior volume of the pouch. In some commercially usefulembodiments, 1 g or less of a modified particulate is selected fordisposition within a pouch, such as 0.001 g to 1.000 g, or 0.001 g to0.900 g, or 0.001 g to 0.800 g, or 0.001 g to 0.700 g, or 0.001 g to0.600 g, or 0.001 g to 0.500 g, or 0.001 g to 0.400 g, or 0.001 g to0.300 g, or 0.001 g to 0.200 g, or 0.001 g to 0.100 g, or 0.001 g to0.090 g, or 0.001 g to 0.080 g, or 0.001 g to 0.070 g, or 0.001 g to0.060 g, or 0.001 g to 0.050 g, or 0.001 g to 0.040 g, or 0.001 g to0.030 g, or 0.001 g to 0.020 g, or 0.001 g to 0.010 g, or 0.001 g to0.005 g.

In embodiments, one or more inactive powders are further included in thepouch, the inactive powder(s) being unreactive with the modifiedparticulates and useful as fillers. Such inactive powders includesaccharides and polysaccharides such as dextrins, celluloses, starches,and the like.

Pouches having a set mass of modified particulate per pouch may becontinuously manufactured using conventional methodology. Further,individual pouches with different masses of modified particulates mayalso be manufactured at the discretion of an operator depending oncommercial demand and ability to configure manufacturing equipment todesired specifications. End use may include use of a single pouch; ormultiple pouches may be deployed serially or contemporaneously asselected by the user to obtain customized treatment for a living plantmaterial targeted for 1-MCP treatment.

Sixth Embodiments

In sixth embodiments, a method comprises, consists essentially of, orconsists of mixing a carrier with a modified particulate of any of thefirst through fourth embodiments to form a coating composition; coatingthe coating composition on a surface of a substrate; and affixing thecoated composition to the substrate to provide a coated substrate. Insome sixth embodiments, the coating composition further includes one ormore non-aqueous solvents. In sixth embodiments, the coating compositionincludes 5 wt % of water or less based on the weight of the coatingcomposition, and in some such embodiments 2 wt % of water or less basedon the weight of the coating composition. In some sixth embodiments oneor more of the mixing, coating, or affixing is accomplished in acontinuous process; in some such embodiments, the coating, and affixingare accomplished serially in a continuous process; in still other suchembodiments mixing, coating, and affixing are accomplished serially in acontinuous process. In sixth embodiments, a coated substrate comprises,consists essentially of, or consists of a substrate having a coatedcomposition affixed to a surface thereof.

In sixth embodiments, the mixing, coating, and affixing are limited bythe need to avoid disgorgement of 1-MCP. Accordingly, in allmethodologies of sixth embodiments, liquid water is substantiallyexcluded from the modified particulates or the coating compositions; andliquid water is substantially excluded from all methodologies of sixthembodiments. “Substantially excluded” herein recognizes that a coatingcomposition may include up to 5 wt % water content, particularly sincecyclodextrin itself, present as part of the clathrate in the modifiedparticulate, naturally associates with water in its crystalline form andthis water will be brought into any coating composition employed insixth embodiments. In the event that a coating composition is found toinclude more than 5 wt % water, the composition, individual componentsthereof, or any mixture of the components may be dried to remove waterusing conventional methods such as zeolite adsorption, oven drying, andthe like as determined by the specific material to be dried. Further inall methodologies of sixth embodiments, temperature proximal to themodified particulate should not exceed 90° C. and preferably should beabout 80° C. or less.

The coating methods of sixth embodiments are carried out in the absenceof liquid water and under conditions of temperature and humidity thatavoid disgorgement of 1-MCP.

Such conditions include but are not limited to temperatures of less than90° C., preferably less than 80° C.; and relative humidity of 50% orless. In embodiments, one of skill may quantify the amount of 1-MCP in amodified particulate present in a coating composition using a modifiedversion of the procedure outlined in Collaborative InternationalPesticides Analytical Council (CIPAC) Information Sheet Number 282,wherein the modification is measuring a coating composition or a coatedsubstrate instead of the modified particulate itself and comparing theamount of 1-MCP in the particulate product to the amount of 1-MCP in themodified particulate present within the coating composition or thecoated substrate. Such methods of quantifying 1-MCP present in a coatingcomposition are demonstrated in one or more examples in the sectionsbelow. We have found that one of skill coating in accordance with themethods disclosed in sixth embodiments herein may easily avoidmeasurable loss of 1-MCP therefrom. Accordingly, the modifiedparticulates present in the coating compositions and the coatedsubstrates of sixth embodiments have the same, or substantially the sameamount of 1-MCP as the particulate product. Stated differently, themethods of sixth embodiments do not lead to loss of 1-MCP gas from a1-MCP clathrate of α-cyclodextrin.

In sixth embodiments, the carrier comprises, consists essentially of, orconsists of: a polymer carrier, a polymerizable carrier, a wax carrier,or an electrostatically printable particulate carrier. In embodiments,components further included in the carrier are nucleating agents, oils,water scavengers, desiccants, adhesion promoters, antifouling agents,thermal or oxidative stabilizers, colorants, adjuvants, plasticizers, ortwo more thereof. Components are not generally limited in nature and aredictated by the particular end use of the cyclodextrin compositions andtreated substrates, further within the boundaries for the carrierproperties set forth above.

In sixth embodiments, the polymer carrier comprises, consistsessentially of, or consists of one or more polymers, that is, one ormore compounds having two or more repeating units; and one or morenon-aqueous solvents. The amounts of polymer and solvent are selected bythe user to provide a targeted viscosity or other physical propertysuitable for coating the coating composition on a substrate.

In embodiments, the one or more polymers comprise, consist of, orconsist essentially of homopolymers, copolymers (herein construed toinclude any polymers comprising more than one type of monomer residuesuch as terpolymers, tetra polymers and the like), or a combinationthereof. The copolymers may be block copolymers, random copolymers,and/or alternating copolymers. The polymers are linear polymers,branched polymers, radial polymers, dendritic polymers, or anycombination thereof. In embodiments, the one or more polymers comprisesone or more addition polymers, one or more condensation polymers, or anycombination thereof.

In embodiments, a polymer is selected from poly(alpha hydroxy acids)(i.e. poly(alpha hydroxy carboxylic acids), polysaccharides, chemicallymodified polysaccharides, polyamides, polyolefins, thermoplasticpolyurethanes, polyureas, polyacrylates, polystyrenes, polyesters,polybutadienes, polysiloxanes, polyalkylsilanes, polyvinyl halides,polyvinylidene halides, polyacrylonitriles, polycarbonates, polyethers,polyglycerols, polyethylene imines, nucleic acids, poly(phenyleneoxide)s, polymethacrylamides, poly(N-alkylacrylamides), poly(divinylether), polyvinyl acetate, polyvinyl alcohol and copolymers thereof,furan resin (poly(2-furanmethanol)), polyhydroxyalkanoates, polyindole,polymethacrylonitrile, and any combination thereof.

In embodiments, a polymer is selected from poly(lactic acid), polyamide,nitrocellulose, polyvinyl butyral, vinyl formal vinyl acetate copolymer,styrene acrylate copolymer, styrene divinyl benzene copolymer, polyesterresin, styrene butadiene copolymer, and any combination thereof. In somesuch embodiments, the polymer is selected from the group consisting ofpolyamide, nitrocellulose, and a combination thereof. In some suchembodiments, the polymer comprises, consists of, or consists essentiallyof a polyamide that is a condensation product of a diamine and a dibasicacid mixture comprising dibasic acid dimers. In some such embodiments,the dibasic acid mixture comprises, consists of, or consists essentiallyof C20-C44 dibasic acid dimers, a C6-C12 dibasic acid, or a combinationthereof. In some such embodiments, the C20-C44 dibasic acid dimerscomprise, consist of, or consist essentially of a C36 dibasic aciddimer. In embodiments, the C6-C12 dibasic acid comprises, consists of,or consists essentially of azelaic acid.

In embodiments, the polymer comprises, consists of, or consistsessentially of nitrocellulose, a polyamide, or a combination thereof. Insome such embodiments, the polymer is a polyamide disclosed in U.S. Pat.No. 5,658,968. In embodiments, the polyamide is a product of a diaminecomposition and a dibasic acid composition. In embodiments, the diaminecomposition comprises, consists of, or consists essentially of a C2-C5diamine, a C6-C12 alkyl diamine, or a combination thereof. Inembodiments, the C2-05 diamine comprises, consists of, or consistsessentially of ethylene diamine and hexamethylene diamine. Inembodiments, the dibasic acid composition comprises, consists of, orconsists essentially of a C20-C44 dibasic acid dimers, a C6-C12 dibasicacid, or a combination thereof. In embodiments, the dibasic acidcomposition comprises, consists of, or consists essentially of a C36dibasic acid dimer, azelaic acid, and n-propanoic acid. In embodiments,the organic solvent comprises, consists of, or consists essentially ofethyl acetate, ethanol, isopropyl acetate, 1-propoxy-2-propanol,heptane, naphtha, propan-1-ol, toluene, or any combination thereof. Inembodiments, the polyamide has a weight average molecular weight ofabout 8,000 to about 12,000.

Non-aqueous solvents useful in the polymer carriers of sixth embodimentsinclude ketones, esters, aldehydes, ketals, acetals, hydrocarbonsolvents, amides, ethers, polyols, alcohols, and any combinationthereof.

Ketones include but are not limited to aromatic, linear, branched,cyclic or alicyclic saturated or unsaturated ketones having 3 to 10carbons. exemplary ketones include but are not limited to acetone,methyl ethyl ketone (butanone), 2-pentanone, 3-pentanone, methylisopropyl ketone, ethyl isopropyl ketone, methyl isobutyl ketone,2-hexanone, acetophenone, cyclopentanone, isophorone, and anycombination thereof.

Ketals include but are not limited to 2-methyl-2-ethyl-1,3-dioxolane;and any one or more ketal reaction products of ethylene glycol,propylene glycol, a sugar alcohol (including glycerol and erythritol) ora sugar with any one or more ketones, ketoesters, and any combinationthereof. Acetals include dimethoxymethane, dioxolane, paraldehyde, andany one or more ketal reaction products of ethylene glycol, propyleneglycol, a sugar alcohol (including glycerol and erythritol) or a sugarwith any one or more of a ketone, ketoester, and any combinationthereof.

Amides include but are not limited to formamide, N-methyl formamide,dimethyl formamide, dimethylacetamide, 2-pyrrolidone,N-methyl-2-pyrrolidone, N-vinylacetamide, N-vinylpyrrolidone, and anycombination thereof. Aldehydes include but are not limited toformaldehyde, acetaldehyde, propionaldehyde, dimethyl formamide,dimethyl carbonate, N-methylmorpholine N-oxide, and any combinationthereof. Ethers include but are not limited to dimethyl ether,tetrahydrofuran, glycol ethers, diethyl ether, and any combinationthereof. Polyols include but are not limited to glycols and sugaralcohols such as glycerol and erythritol. Esters include but are notlimited to aromatic, linear, branched, cyclic or alicyclic saturated orunsaturated alkyl esters having 4 to 20 carbons. Esters include but arenot limited to ethyl acetate, ethyl propionate, animal or planttriglycerides, biodiesel, glycol esters, and any combination thereof.Alcohols include but are not limited to ethanol, n-propanol,isopropanol, n-butanol, isobutanol, t-butyl alcohol, and any combinationthereof.

Hydrocarbon solvents include but are not limited to aromatic, linear,branched, cyclic or alicyclic saturated or unsaturated compounds having6 to 20 carbons or mixtures thereof, or halogenated versions thereofsuch as chlorinated, fluorinated, or brominated versions thereof;halogenated hydrocarbons having 1 to 5 carbons; and cyclic aliphatic oraromatic compounds having one or more N, S, or O atoms incorporatedwithin the ring, such as furans, pyrroles, thiophenes, pyridines,morpholines, dioxanes, and pyrans, alkylated or hydrogenated versionsthereof, and mixtures thereof, petroleum distillates of crude oil suchas mineral spirits, kerosene, white spirits, naphtha, and Stoddardsolvent (CAS ID #: 8052-41-3); paraffinic distillates, and isoparaffinicfluids such as ISOPAR® fluids manufactured by ExxonMobil Chemical Co. ofHouston, Tex.

In some embodiments, a solvent compound includes two more functionalgroups such as two or more ester, amide, keto, aldehyde, hydroxyl,ketal, acetal, or other such functional group. Examples of suchcompounds include β-hydroxy aldehydes, β-hydroxy ketones, (3-hydroxyesters, β-keto esters, semialdehydes, ketal esters, and the like.Generally such compounds have between 3 and 12 carbons.

In embodiments, the organic solvent comprises, consists of, or consistsessentially of ethyl acetate, heptane, methanol, ethanol, propan-1-ol,isopropanol, n-propyl acetate, isopropyl acetate, 1-propoxy-2-propanol,1-pentene, n-pentane, 1-hexene, n-hexane, benzene, cyclohexane,3-methylhexane, 1-heptene, n-heptane, 2,5-dimethylcyclohexane, toluene,1-octene, n-octane, ethylbenzene, m-xylene, p-xylene, 1-decene,n-decane, or any combination thereof. In embodiments, the organicsolvent comprises, consists of, or consists essentially of one or moresolvents selected from the group consisting of ethyl acetate, heptane,ethanol, methanol, naphtha, propan-1-ol, isopropanol, isopropyl acetate,or any combination thereof.

Naphtha is a mixture of liquid hydrocarbons. As used herein, it mayinclude light naphtha (a fraction boiling between 30° C. and 90° C. at 1atmosphere of pressure), heavy naphtha (a fraction boiling between 90°C. and 200° C.), or a combination thereof. In embodiments, the naphthacomprises, consists of, or consists essentially of light naphtha. Inembodiments, the naphtha comprises or consists essentially of n-pentane,1-hexene, n-hexane, cyclohexane, 3-methyl heptane, 1-heptene, n-heptane,toluene, 1-octene, n-octane, ethylcyclohexane, ethylbenzene, m-xylene,p-xylene, 1-decene, n-decane, or any combination thereof.

In sixth embodiments, a polymer carrier is formed by admixing one ormore polymers with one or more non-aqueous solvents, employingconventional mixing methodology for obtaining polymer solutions ordispersions. In embodiments, the polymer carrier includes about 1 wt %to about 80 wt % total of the one or more polymers in the polymercarrier, for example 1 wt % to 75 wt %, or 1 wt % to 70 wt %, or 1 wt %to 65 wt %, or 1 wt % to 60 wt %, or 1 wt % to 55 wt %, or 1 wt % to 50wt %, or 1 wt % to 45 wt %, or 1 wt % to 40 wt %, or 1 wt % to 35 wt %,or 1 wt % to 30 wt %, or 1 wt % to 25 wt %, or 1 wt % to 20 wt %, or 1wt % to 15 wt %, or 1 wt % to 10 wt %, or 1 wt % to 9 wt %, or 1 wt % to8 wt %, or 1 wt % to 7 wt %, or 1 wt % to 6 wt %, or 1 wt % to 5 wt %,or 5 wt % to 75 wt %, or 10 wt % to 75 wt %, or 15 wt % to 75 wt %, or20 wt % to 75 wt %, or 25 wt % to 75 wt %, or 30 wt % to 75 wt %, or 35wt % to 75 wt %, or 40 wt % to 75 wt %, or 45 wt % to 75 wt %, or 50 wt% to 75 wt % total of the one or more polymers in the polymer carrier.

In sixth embodiments, the polymerizable carrier comprises, consistsessentially of, or consists of one or more α,β-unsaturated monomers thatare liquids within a temperature range of 0° C. to 50° C. at atmosphericpressure and are capable of polymerization when irradiated withelectromagnetic radiation. The α,β-unsaturated monomers useful in thepolymerizable carriers are selected from acrylates, methacrylates,acrylamides, methacrylamides, allylic monomers, α-olefins, butadiene,styrene and styrene derivatives, acrylonitrile, and the like. Someexamples of useful monomers include acrylic acid, methacrylic acid, andalkyl esters of acrylic or methacrylic acid wherein the ester groupshave between 1 and 18 carbons, in some embodiments between 1 and 8carbons, and are linear, branched, or cyclic. In embodiments, thepolymerizable carrier includes blends of two or more monomers. In somesuch embodiments, one or more monomers are selected to target specificpermeability properties to water vapor, 1-MCP gas, or both.

In some sixth embodiments, the polymerizable carrier comprises one ormore monomers having two or more unsaturated and polymerizable bonds.Such polyfunctional monomers, which function as crosslinkers, includediacrylates such as ethylene glycol diacrylate, hexanediol diacrylate,and tripropyleneglycol diacrylate; triacrylates such as glyceroltriacrylate and trimethylolpropane triacrylate; and tetraacrylates suchas erythritol tetraacrylate and pentaerythritol tetraacrylate; divinylbenzene and derivatives thereof, and the like. Such monomers providecrosslinking to the cured cyclodextrin composition.

In some such embodiments, a crosslinker or mixture thereof, is presentat less than about 10% by weight of the polymerizable carrier, forexample at about 0.1% to 5% by weight of the polymerizable carrier oreven 0.01% to 1% by weight of the polymerizable carrier.

In some embodiments the polymerizable carrier further includes aphotoinitiator. In some embodiments where affixing (discussed below) iscarried out by UV irradiation, the photoinitiator absorbs the UVradiation and becomes activated, thereby initiating the polymerizationor of the monomers. In such embodiments, the photoinitiator is selectedbased on the wavelength of UV radiation to be employed. Where aphotoinitiator is present in the polymerizable carrier, it is includedin the cyclodextrin compositions at about 0.01% by weight to 5% byweight based on the weight of the coating composition, for example 0.5%by weight to 2% by weight based on the weight of the coatingcomposition. Examples of suitable photoinitiators include those soldunder the trade name IRGACURE® by Ciba Specialty Chemicals Corp. ofTarrytown, N.Y.; those sold under the trade name CHEMCURE® by SunChemical Company of Tokyo, Japan; and LUCIRIN® TPO sold by BASFCorporation of Charlotte, N.C.

In sixth embodiments, the wax carrier comprises, consists essentiallyof, or consists of one or more waxes. A wax comprises, consistsessentially of, or consists of a mixture of compounds characterized bymelting transition onsets, of 23° C. to about 60° C., such as 23° C. to50° C. or 23° C. to 40° C.; and water contact angle of 90° or greaterwhen measured according to ASTM D7334-08 or alternatively solubility inwater of less than 1 wt % at 25° C. In some embodiments, the waxcomprises, consists essentially of, or consists of a petrolatum or apetrolatum-like material. Petrolatum (Merkur; mineral jelly; petroleumjelly; CAS No. [8009-03-8]; EINECS No. 232-373-2) is a purified mixtureof semisolid saturated hydrocarbons having the general formulaC_(n)H_(2n+2), and is obtained from petroleum sources. The hydrocarbonsconsist mainly of branched and unbranched chains although some cyclicalkanes and aromatic molecules with alkyl side chains may also bepresent.

In some embodiments, the wax comprises, consists essentially of, orconsists of petrolatum-like material that is sourced from vegetablematter. Such materials are described, for example, in U.S. Pat. No.7,842,746. The vegetable based petrolatum-like materials are made fromhydrogenated polymerized vegetable oils, such as hydrogenated blown oilsor hydrogenated copolymerized oils. The petrolatum-like materials areformulated to have a targeted range of properties and thus are suitablyformulated to have melting transition onset of between about 23° C. and40° C., as well as water contact angle to the surface of 90° or greater,measured according to ASTM D7334-08, and/or solubility in water of lessthan 1 wt % at 25° C.

In some embodiments, oils are included in the wax carrier. Oils arehydrophobic compounds that are liquids at 25° C., wherein hydrophobicmeans solubility in water of less than 1 wt % at 25° C. In someembodiments, the oil is a hydrocarbon or silicone oil; in otherembodiments the oil is a plant oil such as peanut oil, walnut oil,canola oil, linseed oil, and the like. In some embodiments, the oil is a“drying oil”, that is, the oil reacts with oxygen in the atmosphere toform crosslinks. In embodiments, one or more oils are added to the waxcarrier at about 0.1 wt % to 10 wt % of the weight of the carrier, orabout 0.5 wt % to 5 wt % of the weight of the carrier, or about 0.1 wt %to 5 wt % of the weight of the carrier.

In sixth embodiments, the electrostatically printable carrier comprises,consists essentially of, or consists of an electrostatically printableparticulate. The electrostatically printable particulate is a mixture ofone or more polymers (selected in embodiments from the polymers listedabove regarding the polymer carrier) in a particulate form, that is, apolymer particulate; the polymer particulate optionally includes one ormore additional components associated with electrophotographic tonercompositions, such as charge control agents and colorants. Usefulpolymer particles suitably employed in electrostatically printablecarriers include styrene acrylate copolymers, styrene divinyl benzenecopolymers, polyester resins, styrene butadiene copolymers, andpolyolefins, wherein the polymer particles have particle sizes in therange of about 5 μm to 50 μm in the largest direction. In someembodiments the electrostatically printable carrier is a previouslymanufactured toner composition employed for electrostatic printing.

Further in sixth embodiments, combinations of the foregoing carriers orindividual components thereof are suitably mixed to form a carrierblend. Non-limiting examples of such carrier blends include apolymerizable carrier mixed with a wax or a polymer or both; a waxcarrier mixed with a non-aqueous solvent, and the like withoutlimitation. Coating compositions as defined herein include any suchcarrier blends without limit. In some embodiments carrier may furtherinclude one or more fillers, which include but not limited to polymerbeads and bubbles; glass or ceramic beads or bubbles; mineralparticulates such as silicas, calcium carbonate; and similar inertmaterials.

In sixth embodiments, a carrier as described above is mixed with amodified particulate to form a coating composition. The mixing isaccomplished by one more methods known to those of skill in mixingpowders with liquids or in mixing two particulate solids. nonlimitingexamples of useful mixing methods include static mixing, injectionmixing, stirring, blade mixing, sonicating, or a combination thereof.Where a coating composition includes more than two components, order ofmixing the components is not limited except as required by the specificcoating composition targeted, that is, the components thereof and theirinteractions. For example, it may be advantageous to mix a polymer witha non-aqueous solvent prior to mixing the modified particulate with thepolymer/solvent combination, in order to fully disperse or dissolve thepolymer in the solvent prior to mixing the modified particulate with thepolymer/solvent combination. Further, it may be useful to heat one ormore carrier components to facilitate mixing; heating without limitationis useful except, however, that when the modified particulate is mixedwith the carrier or component thereof, the carrier or component thereofshould have a temperature of 90° C. or less, preferably 80° C. or less.Further, it may be advantageous to dry a carrier or carrier component inorder to obtain a coating composition having less than 5 wt % waterafter the mixing is completed.

In sixth embodiments, a coating composition comprises, consistsessentially of, or consists of a carrier and a modified particulate ofany of first through fourth embodiments. The amount of the modifiedparticulate in the coating composition is not particularly limited;however, in some industrially useful embodiments the coating compositionincludes between about 0.001 g/L and 500 g/L of the modified particulatebased on the volume of the coating composition, or similarly 0.001 g/kgto 500 g/kg of the modified particulate based on the weight of thecoating composition, for example 0.0001 wt % to 45 wt %, or 0.0001 wt %to 40 wt %, or 0.0001 wt % to 35 wt %, or 0.0001 wt % to 30 wt %, or0.0001 wt % to 25 wt %, or 0.0001 wt % to 20 wt %, or 0.0001 wt % to 15wt %, or 0.0001 wt % to 10 wt %, or 0.0001 wt % to 5 wt %, or 0.0001 wt% to 1 wt %, or 0.001 wt % to 50 wt %, or 0.001 wt % to 45 wt %, or0.001 wt % to 40 wt %, or 0.001 wt % to 35 wt %, or 0.001 wt % to 30 wt%, or 0.001 wt % to 25 wt %, or 0.001 wt % to 20 wt %, or 0.001 wt % to15 wt %, or 0.001 wt % to 10 wt %, or 0.001 wt % to 5 wt %, or 0.001 wt% to 1 wt %, or 0.01 wt % to 50 wt %, or 0.01 wt % to 45 wt %, or 0.01wt % to 40 wt %, or 0.01 wt % to 35 wt %, or 0.01 wt % to 30 wt %, or0.01 wt % to 25 wt %, or 0.01 wt % to 20 wt %, or 0.01 wt % to 15 wt %,or 0.01 wt % to 10 wt %, or 0.01 wt % to 5 wt %, or 0.01 wt % to 1 wt %,or 1 wt % to 50 wt %, or 1 wt % to 45 wt %, or 1 wt % to 40 wt %, or 1wt % to 35 wt %, or 1 wt % to 30 wt %, or 1 wt % to 25 wt %, or 1 wt %to 20 wt %, or 1 wt % to 15 wt %, or 1 wt % to 10 wt %, or 1 wt % to 9wt %, or 1 wt % to 8 wt %, or 1 wt % to 7 wt %, or 1 wt % to 6 wt %, or1 wt % to 5 wt %, or 1 wt % to 4 wt %, or 1 wt % to 3 wt % of themodified particulate based on the weight of the coating composition.

In sixth embodiments, coating the coating composition onto a substrateincludes coating using one or more industrially useful methods selectedfrom die coating including drop die and horizontal die coating, slotcoating, brush coating, spray coating, flood coating, curtain coating,screen printing, inkjet printing, gravure or reverse gravure coating,flexographic printing, or electrostatic printing. Coating the coatingcomposition includes use of temperatures of 90° C. or less, preferably80° C. or less, during and throughout the coating process.

Substrates usefully employed to form the coated substrates of theinvention include any substrate suitable for disposition of the coatingcomposition on at least a portion of a surface thereof. In someembodiments, the substrate surface is the surface of a plate, film, orsheet and thus is substantially planar and well suited for continuousindustrial coating operations. In other embodiments, the coatingcomposition is disposed on a non-planar substrate surface or anirregular substrate surface to form a coated substrate. In someembodiments, the substrate is a container. Suitable substrates includecellulosic and other natural and synthetic biomass-based substrates, aswell as synthetic petroleum-based thermoplastic polymeric films, sheets,fibers, or woven, felted, or nonwoven fabrics, and composite materialsincluding one or more thereof. Some examples of substrates usefullyemployed to form coated substrates include paper, paperboard, cardboard,carton board such as corrugated cardboard, coated paper or cardboardsuch as extrusion coated paper or cardboard, chipboard, nonwoven,felted, or woven fabrics, wood, netting, wood/thermoplastic composites,glass, metals, polyvinyl halides such as poly(vinyl chloride)(plasticized and unplasticized) and copolymers thereof polyvinylidenehalides such as polyvinylidene chloride and copolymers thereofpolyolefins such as polyethylene, polypropylene, copolymers thereof, andmorphological variations thereof including LLDPE, LDPE, HDPE, UHMWPE,metallocene polymerized polypropylene, and the like; polyesters such aspolyethylene terephthalate (PET) or polylactic acid (PLA) andplasticized variations thereof polystyrene and copolymers thereofincluding HIPS; polyvinyl alcohol and copolymers thereof; copolymers ofethylene and vinyl acetate; and the like. Blends, alloys, composites,crosslinked versions thereof, and recycled versions thereof are alsouseful in various embodiments. Two or more layers of such substrates arepresent in some embodiments as multilayer films or sheets. In someembodiments, the substrates are substantially continuous. In someembodiments the substrates are permeable, porous, microporous,perforated, meshed, foamed (open- or closed-cell), woven or nonwovenfabrics, or netting.

In embodiments, the substrate is or includes a polyolefin, polyolefinplastomer, a styrene butadiene copolymer, or a polyester. In some suchembodiments the substrate is oriented in one direction or in twodirections (biaxially oriented). In embodiments, the substrate is anoriented polypropylene film.

In some embodiments the substrates contain one or more fillers,stabilizers, colorants, and the like. In some embodiments the substrateshave one or more surface coatings thereon. In some embodiments thesubstrate has a surface coating thereon prior to coating the coatingcomposition. Surface coatings include protective coatings such as wax,acrylic polymer, vinyl acetate/ethylene copolymer and ethylene/vinylchloride copolymer coatings, and the like; coatings to render surfacesprintable; coatings to render otherwise permeable substratesimpermeable; adhesive coatings; primers; tie layer coatings; metalizedor reflective coatings; and the like. The type and function of surfacecoatings are not particularly limited within the scope of thisdisclosure; likewise the manner in which the surface coatings areapplied is not particularly limited. In various embodiments where asurface coating will be exposed to an enclosed or partially enclosedvolume within a produce package, the surface coating is subsequentlycoated with the coating composition.

In some embodiments, the substrate is polyethylene extrusion coatedrecyclable paperboard, corrugated cardboard, or carton board packaging,for shipment of produce. Printed paperboard or corrugated cardboardpackaging ranges from bulk bins to specialized display cartons. Theextrusion coated surface provides an opportunity to dispose a coatingcomposition thereon.

In some embodiments the substrate is pretreated with a plasma or coronatreatment prior to disposing the coating composition thereon. Suchsurface treatments are well known in the industry and are often employedin the industry to modify the surface energy of substrates, for exampleto improve wetting or adhesion of coatings or printed materials to thesurface of a substrate. Such surface treatments are likewise useful insome embodiments to improve wetting and adhesion of the coatingcompositions to the substrate.

In some embodiments, the substrate is treated with a primer prior todisposing the coating composition thereon. In some such embodimentsfilms and sheets of thermoplastics used as substrates are obtained orpurchased already pre-coated with a primer; a wide variety of such filmsand sheets are available in the industry and are targeted for improvingadhesion of various types of coatings thereto. In some embodiments aplain film or sheet is coated “in line” with a primer. A plethora ofsuch coatings and technologies are available and one of skill willunderstand that primer coatings are optimized for each application andfor the composition to be disposed thereon. Some examples of primercompositions suitably disposed between the substrate surface and thecoating compositions include polyethyleneimine polymers such aspolyethyleneimine, alkyl-modified polyethyleneimines in which the alkylhas 1 to 12 carbon atoms, poly(ethyleneimineurea), ethyleneimine adductsof polyaminepolyamides, and epichlorohydrin adducts ofpolyaminepolyamides, acrylic ester polymers such as acrylamide/acrylicester copolymers, acrylamide/acrylic ester/methacrylic ester copolymers,polyacrylamide derivatives, acrylic ester polymers containing oxazolinegroups, and poly(acrylic ester)s. In embodiments, the primer compositionis an acrylic resin, a polyurethane resin, or mixture thereof.

An alternative method to treat or “prime” materials is via a glowdischarge using either corona or atmospheric plasma. Both methods aretypically used in an air atmosphere but other gases or gas mixtures canalso be used and may include, and not limited to, oxygen, nitrogen,argon, helium, carbon dioxide, ammonia, water vapor, etc. The glowdischarge treatment has the ability to “clean” material surfaces byremoval of contaminants and to create polar moieties on surfaces. Insome embodiments, such treatments promote adhesion of disposed materialsthereto, uniformity of disposed coatings, or both. Examples of coronaand plasma systems are those available from Enercon Industries,Vetaphone, and Plasmatreat. Advantages of corona and plasma treatmentinclude: a) there is no need to add another chemical to the substrate,b) there is no need for drying or post curing of the substrate, c) glowdischarge is a highly efficient process from gas utilization efficiency,and d) such processes are well aligned with sustainability guidelinesregarding product, occupational and environmental safety.

In sixth embodiments, a coating composition is coated on a substratesurface using one or more methods well known to those of skill in thecoating and/or printing industry, further wherein specific coatingmethodology is determined by the physicochemical properties of thecarrier. Coating is carried out using conventional apparatus andcondition, excluding conditions wherein the temperature of the modifiedparticulate exceeds 90° C., and preferably excluding conditions whereinthe temperature of the modified particulate exceeds 80° C. Coatingmethods suitably employed to coat the coating compositions include butare not limited to die coating, slot coating, brush coating, spraycoating, flood coating, screen printing, fluidized bed coating, inkjetprinting, gravure or reverse gravure coating, flexographic printing,electrostatic printing, and the like.

In some embodiments the coating composition is heated to lower theviscosity thereof prior to and/or during the coating. In suchembodiments, the heating is heating to a temperature of less than 90°C., preferably to 80° C. or less. The coating method may be continuouscoating, which is coating of all or substantially all of a substratesurface with the coating composition; or discontinuous coating, which iscoating only a selected portion of the coatable substrate surface withthe coating composition. In some embodiments, the discontinuous coatingis a pattern coating.

Coating of the coating compositions includes selecting a coating weightof the coating composition on the substrate. Such selection is notparticularly limited and in some embodiments is selected for use with aknown method or known coating apparatus requirement or limitation. Inembodiments the coating is selected to provide 0.1 g/m² to 100 g/m² ofthe coating composition on the substrate, for example 0.1 g/m² to 90g/m², or 0.1 g/m² to 80 g/m², or 0.1 g/m² to 70 g/m², or 0.1 g/m² to 60g/m², or 0.1 g/m² to 50 g/m², or 0.1 g/m² to 40 g/m², or 0.1 g/m² to 30g/m², or 0.1 g/m² to 20 g/m², or 0.1 g/m² to 15 g/m², or 0.1 g/m² to 10g/m², or 1 g/m² to 90 g/m², or 1 g/m² to 80 g/m², or 1 g/m² to 70 g/m²,or 1 g/m² to 60 g/m², or 1 g/m² to 50 g/m², or 1 g/m² to 40 g/m², or 1g/m² to 30 g/m², or 1 g/m² to 20 g/m², or 1 g/m² to 15 g/m², or 1 g/m²to 10 g/m² of the coating composition on the substrate.

In sixth embodiments, affixing the coating composition on the substratesurface is accomplished using one or more methods known to those ofskill in the coating and/or printing industry, further wherein specificaffixing methodology is determined by the physicochemical properties ofthe carrier and the coating method employed to coat the coatingcomposition on the substrate. Affixing methods suitably employed toaffix the coating compositions to the substrate surface includeevaporating (drying), irradiating, cooling, and applying heat andpressure.

In sixth embodiments where the carrier includes a polymer and anon-aqueous solvent, affixing comprises or consists of evaporating thesolvent from the coated composition. In some embodiments, evaporatingcomprises or consists of heating the coating composition using settemperatures of 90° C. or below, in embodiments 80° C. or below. In someembodiments, evaporating comprises or consists of convecting by applyinga gas such as air, dry air, or dry nitrogen gas to the coatingcomposition. In some embodiments, affixing comprises or consists of acombination of evaporating and convecting.

In sixth embodiments where the carrier includes one or moreα,β-unsaturated monomers, affixing comprises or consists of irradiatingthe coated composition with electromagnetic radiation. In some suchembodiments, affixing is accomplished employing UV radiation. UVradiation is electromagnetic radiation having a wavelength of between 10nm and 400 nm. In embodiments, wavelengths between about 100 nm and 400nm are useful; in other embodiments wavelengths between about 200 nm and380 nm are useful. Wavelength, as well as radiation intensity and timeof exposure, is selected based on processing parameters such as theabsorption characteristics of the photoinitiator employed andpolymerization kinetics of the monomer(s) selected. Useful methodologiesand criteria to consider in UV curing are described, for example, inU.S. Pat. No. 4,181,752.

In embodiments, affixing by irradiation is accomplished in anenvironment that is substantially free of atmospheric moisture, air, orboth. Such an environment is achieved, in some embodiments, by purgingthe coated area with an inert gas such as carbon dioxide or nitrogenduring the curing. In other embodiments, water and air are suitablyexcluded by applying a UV-transparent, water impermeable liner on top ofthe coating composition and prior to the affixing. The liner material isnot particularly limited in composition or thickness and is selected forUV transparency at the desired wavelength.

In other embodiments, affixing by irradiation is accomplished employingelectron beam, or e-beam, radiation. E-beam methods employed topolymerize the cyclodextrin composition are described, for example, inthe web article by Weiss et al., “Pulsed Electron Beam Polymerization”,posted Jan. 1, 2006(http://www.adhesivesmag.com/Articles/Feature_Article/47965fdd41bc8010VgnVCM100000f932a8c0______).Additional information is available as disclosed in U.S. Pat. Nos.3,940,667; 3,943,103; 6,232,365; 6,271,127; 6,358,670; 7,569,160;7,799,885, and the like.

In sixth embodiments where the carrier includes a wax, affixing mayinclude cooling the coated composition and in some embodimentsadditionally laminating the coated composition with a second substratewhich is a thermoplastic sheet or film that is the same or differentfrom the substrate onto which the coated composition is affixed.

In sixth embodiments where the carrier is an electrostatically printableparticulate, affixing means fusing, wherein fusing means applyingpressure and/or heat to the coating composition. Conventionalelectrostatic printing includes a fusing step wherein a substrate coatedwith polymer particles (toner) is passed through a heated nip (fusingrollers) to heat and “fuse” the polymer particles to the substrate(partially melt and coalesce the polymer particles of the toner). Suchfusing is a suitable method for affixing the coating composition to thesubstrate, where the coating composition comprises, consists essentiallyof, or consists of a polymer particulate and a modified particulate.

In embodiments, the fusing comprises passing the substrate and coatedcomposition between the fusing rollers to obtain an applied pressure tothe coating composition. In such embodiments, the fusing comprises orconsists of providing a physical pressure point to compress the coatingcomposition against the substrate, affixing the coating compositionthereto to result in a coated composition. In other embodiments, thefusing rollers are heated, for example by setting the temperature offusing rollers to about 80° C. to 200° C., or about 100° C. to 190° C.,or about 110° C. to 180° C., or about 120° C. to 170° C., or about 130°C. to 160° C., or about 130° C. to 150° C. For example, in someembodiments where the substrate includes a wax coating thereon, thefusing rollers are not heated or are heated to a temperature of about100° C. or less, such as 60° C. to 90° C.

Accordingly, in sixth embodiments, affixing the coating composition tothe substrate results in a coated substrate. The coated substrates ofsixth embodiments comprise, consist essentially of, or consist of asubstrate having a coating affixed to at least a portion of a surfacethereof, wherein the affixed coating comprises, consists essentially of,or consists of a polymer, a wax, or a combination thereof; and amodified particulate of any of first through fourth embodimentsdispersed within the coating. The polymer or wax is present as a resultof affixing methods that include evaporating, irradiating, or fusing.

In sixth embodiments, the thickness and coating weight of the affixedcoating are selected by the user in accord with one or more commerciallyuseful embodiments, further in accord with the physicochemicalproperties of the carrier and the weight percent of modified particulatedispersed in the coating. In some sixth embodiments, the coatingthickness is between 0.01 μm and 50 μm thick on all or a portion of thecoated substrate surface, for example 0.01 μm to 40 μm, or 0.01 μm to 30μm, or 0.01 μm to 25 μm, or 0.01 μm to 20 μm, or 0.01 μm to 15 μm, or0.01 μm to 10 μm, or 0.01 μm to 9 μm, or 0.01 μm to 8 μm, or 0.01 μm to7 μm, or 0.01 μm to 6 μm, or 0.01 μm to 5 μm, or 0.01 μm to 4 μm, or0.01 μm to 3 μm, or 0.01 pin to 2 μm, or 0.01 pin to 1 μm, or 0.1 pin to40 μm, or 0.1 pin to 30 μm, or 0.1 pin to 25 μm, or 0.1 pin to 20 μm, or0.1 pin to 15 μm, or 0.1 pin to 10 μm, or 0.1 pin to 9 μm, or 0.1 μm to8 μm, or 0.1 μm to 7 μm, or 0.1 μm to 6 μm, or 0.1 μm to 5 μm, or 0.1 μmto 4 μm, or 0.1 μm to 3 μm, or 0.1 μm to 2 μm, or 0.1 μm to 1 μm, or 1μm to 50 μm, or 1 μm to 40 μm, or 1 μm to 30 μm, or 1 μm to 20 μm, or 1μm to 10 μm, or 1 μm to 5 μm, or 5 pin to 50 μm, or 5 pin to 40 μm, or 5pin to 30 μm, or 5 pin to 20 μm, or 5 pin to 10 μm thick on all or aportion of the coated substrate surface.

In some sixth embodiments, the coating obtains a coating weight of 0.01g/m² to 10 g/m² on the substrate, for example 0.01 g/m² to 9 g/m², or0.01 g/m² to 8 g/m², or 0.01 g/m² to 7 g/m², or 0.01 g/m² to 6 g/m², or0.01 g/m² to 5 g/m², or 0.01 g/m² to 4 g/m², or 0.01 g/m² to 3 g/m², or0.01 g/m² to 2 g/m², or 0.01 g/m² to 1 g/m², or 0.1 g/m² to 10 g/m², or0.1 g/m² to 9 g/m², or 0.1 g/m² to 8 g/m², or 0.1 g/m² to 7 g/m², or 0.1g/m² to 6 g/m², or 0.1 g/m² to 5 g/m², or 0.1 g/m² to 4 g/m², or 0.1g/m² to 3 g/m², or 0.1 g/m² to 2 g/m², or 0.1 g/m² to 1 g/m², or 0.5g/m² to 10 g/m², or 0.5 g/m² to 9 g/m², or 0.5 g/m² to 8 g/m², or 0.5g/m² to 7 g/m², or 0.5 g/m² to 6 g/m², or 0.5 g/m² to 5 g/m², or 0.5g/m² to 4 g/m², or 0.5 g/m² to 3 g/m², or 0.5 g/m² to 2 g/m², or 0.5g/m² to 1 g/m², or 1 g/m² to 10 g/m², or 1 g/m² to 9 g/m², or 1 g/m² to8 g/m², or 1 g/m² to 7 g/m², or 1 g/m² to 6 g/m², or 1 g/m² to 5 g/m²,or 1 g/m² to 4 g/m², or 1 g/m² to 3 g/m², or 1 g/m² to 2 g/m² on thesubstrate.

Seventh Embodiments

Seventh embodiments are methods of disgorging 1-MCP from the modifiedparticulate of first through fourth embodiments, the modifiedparticulate pouches of fifth embodiments, or the coated substrates ofsixth embodiments by subjecting the modified particulate of firstthrough sixth embodiments to disgorgement conditions.

Disgorgement conditions refer to the atmospheric conditions of ambientpressure (about 1 atm), temperature between 0° C. and about 50° C., andrelative humidity of about 80% to 100%. Subjecting the modifiedparticulate of first through fourth embodiments, the modifiedparticulate pouches of fifth embodiments, or the coated substrates ofsixth embodiments to disgorgement conditions will cause release of 1-MCPgas therefrom. Such conditions maintained over a period of between 1minute and 1 year will cause continuous release of 1-MCP until the gasis depleted. Disgorgement conditions of the modified particulates offirst through fourth embodiments, pouches of fifth embodiments, andcoated substrates of sixth embodiments are the same as disgorgementconditions for the (unmodified) particulate products, including pouchesand coated substrates comprising unmodified particulate products. Whensubjected to identical disgorgement conditions of humidity, temperature,and pressure, the modified and unmodified particulates exhibit differentrates of 1-MCP disgorgement. When subjected to identical disgorgementconditions of humidity, temperature, and pressure, pouches or coatedsubstrates comprising a modified particulate exhibit different rates of1-MCP disgorgement from pouches or coated substrates comprising theunmodified particulate.

We have found that differences in mean particle size as small as 1 μmare sufficient to cause a measurable difference in the rate of 1-MCPdisgorgement from 1-MCP clathrate particulates, when the particulatesare subjected to disgorgement conditions. Thus, a first modifiedparticulate having a mean particle size of 4 μm releases measurablyfaster than a second modified particulate having a mean particle size of5 μm, and so on for any selected mean particle size.

While further presence of liquid water proximal to or even in contactwith the modified particulates of first through fourth embodiments,pouches of fifth embodiments, and coated substrates of sixth embodimentsis not excluded herein, it is not necessary to include or use liquidwater to obtain disgorgement of 1-MCP.

In some seventh embodiments, a portion of the water vapor contacting themodified particulates of first through fourth embodiments, pouches offifth embodiments, or coated substrates of sixth embodiments is suppliedby biological respiration of a living plant or portion thereof, whereinthe living plant or portion thereof is situated proximal to the modifiedparticulates of first through fourth embodiments, pouches of fifthembodiments, or coated substrates of sixth embodiments. Accordingly, insuch seventh embodiments, subjecting to disgorgement conditions suitablyincludes placing the modified particulates of first through fourthembodiments, pouches of fifth embodiments, or coated substrates of sixthembodiments proximal to living plant material, wherein water vapor fromrespiration of the living plant material can contact the modifiedparticulate, pouch, or coated substrate.

EXPERIMENTAL

General Procedures

Characterization of Particle Size of Alpha-Cyclodextrin/1-MethylCyclopropene Complexes

Mean particle size, median particle size, mode size, specific surfacearea, and diameter on cumulative were measured using a HORIBA LA-950Laser Particle Size Analyzer, available from Horiba Scientific.

Concentration of 1-Methylcyclopropene (1-MCP) in Container Headspaces

Concentration of 1-methyl cyclopropene volume/volume) in containerheadspace gas was measured by removing 250 mL of the headspace gas usinga six port, two-position gas sampling valve (available for example asValco #EC6W from Valco Instruments Inc. of Houston, Tex.) interfaceddirectly to a gas chromatograph (e.g. Agilent 7890B) using a RTx-5 GCcolumn, 30 m×0.25 mm I.D., 0.25 μm film (available from Restek, Inc., ofBellefonte, Pa.) equipped with a flame ionization detector (FID) andcalibrated against a 6-point 1-butene (99.0% pure, available for examplefrom Scott Specialty Gases, Plumsteadville, Pa.; also known as AirLiquide America Specialty Gases LLC) calibration curve. Employing thismethod, the amount of 1-MCP released (measured as μL/L—volume/volume(v/v)) from the sample of 1-MCP/alpha-cyclodextrin complex was obtained.

Drying of Liquids

Liquid such as overprint varnish, polymer solutions, and organicsolvents were dried as follows: A vacuum oven equipped with a vacuumpump and solvent trap was preheated to 220° C. Molecular sieve (DeltaAdsorbents 4A 8×12B) of nominal pore size 4 A and 8×12 mesh was placedin Pyrex® pans in the vacuum oven, and the molecular sieve was dried foreight hours at 220° C. Then the oven was shut off and the molecularsieve was allowed to cool for about 16 hours under vacuum. The followingday, the molecular sieve was transferred to and enclosed in one-gallonglass jars.

About 2.5 gallons of the liquid to be dried was disposed in afive-gallon pail. Dried molecular sieve (25% by weight of the liquid)was added to the liquid in the pail. The five-gallon pail was sealed,the lid of the pail was vented, and the mixture of molecular sieve andthe liquid was allowed to dry for five days before the dried liquid wasdecanted off the molecular sieve into an airtight pail that was thensealed.

Measurement of Moisture Content of Organic Liquids

Moisture content of liquids such as overprint varnish was measured formoisture content by Karl Fisher moisture analysis using a MetrohmTITRANDO 851 coulometer.

Measurement of Percent Solids of Solutions

The percent solids of solutions such as overprint varnish was determinedas follows: About 1 ml of the solution was added to each of threepre-weighed aluminum dishes. Each dish was reweighed. The dishes werethen heated at 160° C. for one hour. Each dish was then reweighed. Thepercent solids of each sample was calculated from the weight differencebetween the weight of the dish before heating and after heating. Thenthe mean of the three individual values was calculated.

Measurement of Coating Weights

To measure coating weight, 1000 feet (304.8 meters) of a 13-inch wide(0.3302-meter wide) of coated roll was wound onto a weighed core havinga diameter of three inches (0.0762 meters). The wound roll wasreweighed, and the weight of the core was subtracted from the weight ofthe coated roll to reveal the weight of the coated substrate. Next 1000feet (304.8 meters) of the uncoated substrate used in the coating of forCoating Rolls 1-4 was wound onto a weighed core having a diameter ofthree inches (0.0762 meters). The weight of the substrate wascalculated. The weight of the substrate was then subtracted from theweight of the coated substrate to yield the weight of the coating. Thecoating weight was then converted to grams per square inch and grams persquare meter.

EXAMPLES Example 1

A sample of Batch Y of alpha-cyclodextrin complex of1-methylcyclopropene (HAIP, obtained from AgroFresh Solutions), wastaken and the particle size measured by HORIBA LA-950 Laser ParticleSize Analyzer. A portion of Batch Y was milled by Jet milling to reducethe mean particle size of the HAIP (as measured by HORIBA LA-950 LaserParticle Size Analyzer) from an initial mean particle size of about 46microns to a mean particle size of about 5 microns to produce Batch Z.Therefore Batch Z was a portion of Batch Y that had been milled by jetmilling. The particle size of the milled material, Batch Z, was alsomeasured by HORIBA LA-950 Laser Particle Size Analyzer. The particlesizes of Batch Y and Batch Z are displayed in TABLE 1.

Images of Batch Y and Batch Z were obtained using scanning electronmicroscopy. FIG. 1 shows the scanning electron micrograph of Batch Y(i.e. before milling) and FIG. 2 shows the scanning electron micrographof the same material but after milling—Batch Z. The much smallerparticle size of Batch Z than Batch Y is evident from the two images.

TABLE 1 Alpha-cyclodextrin/1-MCP complex particle size results Batch YBatch Z Mean particle size 46.2 5.0 (μm) Diameter on D10 11.1 2.2cumulative D50 40.2 4.3 % (μm) D90 88.9 8.5

Example 2

An oriented polypropylene (PP) (Q00061, 100 gauge from ProfolKunststoffe GmbH), was used to prepare six plastic pouches as follows.Six 4-inch by 8-inch (10.16 cm by 20.32 cm) sheets were cut from thepolypropylene. Each sheet was folded in half so that the resultingfolded substrate was four inches by four inches (10.16 cm by 10.16 cm).Two edges of each folded substrate were heat-sealed using a heat sealer(H-1254 from Uline) to form a pouch with an open end. Six open poucheswere formed in that way.

Each of three of the pouches was filled with 0.05 g of Batch Y. Each ofthe remaining three pouches was filled with 0.05 g of Batch Z. The openends of all six open-ended pouches were heat-sealed using a heat sealer(H-1254 from Uline) to provide six sealed pouches as shown in TABLE 2.

TABLE 2 Sealed pouches of alpha-cyclodextrin/ 1-MCP complex; Batches Yand Z Batch of alpha- cyclodextrin/1-MCP Sealed pouch HAIP complex P1 YP2 P3 P4 Z P5 P6

Example 3

Each of pouches P1 to P6 was rolled up and inserted into a 250 mL glassBoston round bottle. One mL of deionized water was injected into eachbottle with care taken to avoid injection of water directly onto thepouch. After injection of the water, each bottle was immediately sealedwith a TEFLON®-faced silicone rubber septum. For each bottle, 1-MCP inthe headspace was measured by removing a 250 μL sample of the headspacegas. A gas sample was removed at 30 minutes, one hour, two hours, fourhours, eight hours, and 24 hours after the water injection.

The 1-MCP was measured in each gas sample by removing the 250 μL sampleof headspace gas using the method described above in General Procedures.Employing this method, the amount of 1-MCP released (measured asμL/L—volume/volume (v/v), or parts per million (ppm) by volume) fromeach sealed pouch versus time was obtained. The data are displayed inTABLE 3.

TABLE 3 Concentration of 1-MCP released into headspace as measured by GCin Example 3. Batch of 1-MCP concentration (ppm) in headspace complexPouch 0.5 hours 1 hour 2 hours 4 hours 8 hours 24 hours Z P1 0 0.3640.979 12.585 94.683 332.620 P2 8.744 27.310 49.873 106.63 241.65 500.87P3 0 0.561 5.206 118.46 349.95 872.82 Average 2.91 9.41 18.69 79.23228.76 568.77 P1-P3 Y P4 0 0 0 0.369 2.131 11.612 P5 0 0 0 0 0 3.406 P60 0 0 0 0.973 6.276 Average 0 0 0 0.12 1.03 7.10 P4-P6

In FIG. 3, the average 1-MCP concentration (volume/volume) released fromeach pouch into the headspace (displayed in TABLE 3) is plotted againsttime after water injection.

The concentration of the 1-MCP released into the headspace of thebottles was greater for Batch Z (mean particle size 5.0 microns) thanthe same batch not subjected to the described milling step, Batch Y(mean particle size 46.2 microns).

Example 4

Four batches of alpha-cyclodextrin complex of 1-methylcyclopropene(HAIP, obtained from AgroFresh Solutions), Batch i, Batch ii, Batch iii,and Batch iv were taken. Batches iii and iv had been pre-milled to asmaller particle size. Each of the four batches was measured forparticle size distribution by laser-diffraction analysis using a HoribaLA-950 particle size analyzer. Particle size results are given in TABLE4:

TABLE 4 Alpha-cyclodextrin/1-MCP complex particle size results Batch iBatch ii Batch iii Batch iv Mean particle size 50.5 44.9 7.2 5.4 (μm)Diameter on D10 8.9 11.5 2.9 2.4 cumulative D50 30.9 43.2 6.3 4.7 % (μm)D90 100.9 98.6 12.6 9.4

Example 5

Two substrates, polyethylene terephthalate (PET) (SKYROL® SM 30, 75gauge, from SKC Inc.) and polypropylene (PP) (Q00061, 100 gauge fromProfol Kunststoffe GmbH), were used to prepare four plastic pouches fromeach substrate as follows. Four 4-inch by 8-inch (10.16 cm by 20.32 cm)sheets were cut from each substrate. Each sheet was folded in half sothat the resulting folded substrate was four inches by four inches(10.16 cm by 10.16 cm). Two edges of each folded substrate wereheat-sealed using a heat sealer (H-1254 from Uline) to form a pouch withan open end.

A known weight of each of the four HAIP Batches i-iv of Example 4 wasplaced in each of the four open-ended polypropylene pouches. A knownweight of each of the four HAIP Batches i-iv was further placed in eachof the four open-ended polyester pouches. The open ends of all eightopen-ended pouches were heat-sealed using a heat sealer (H-1254 fromUline) to provide eight sealed pouches, as shown in TABLE 5.

TABLE 5 Measured weight of HAIP in sealed pouches Batch of alpha- Weightof Sealed cyclodextrin/1-MCP Sub- HAIP in pouch HAIP complex stratepouch (grams) P7 

PET 0.0997 P8 

0.1010 P9 

0.1003 P10

0.1009 P11

PP 0.0504 P12

0.0497 P13

0.0504 P14

0.0504

Example 6

Each of pouches P7 to P14 was rolled up and inserted into a 250 mL glassBoston round bottle. One mL of deionized water was injected into eachbottle with care taken to avoid injection of water directly onto thepouch. After injection of the water, each bottle was immediately sealedwith a TEFLON®-faced silicone rubber septum. For each bottle, 1-MCP inthe headspace was measured by removing a 250 μL sample of the headspacegas. A gas sample was removed at one hour, two hours, four hours, eighthours, 24 hours, 49 hours, and 172 hours after the water injection.

The 1-MCP was measured in each gas sample by removing the 250 μL sampleof headspace gas using the method described above in General Procedures.Employing this method, the amount of 1-MCP released (measured asμL/L—volume/volume (v/v)) from each sealed pouch was obtained. It wasnoted that Pouch P12 had a pinhole. Accordingly, the data from Pouch P12were not included. The remaining data are displayed in TABLE 6.

TABLE 6 Concentration of 1-MCP released into headspace as measured by GCin Example 6. Weight of HAIP in pouch 1-MCP concentration (ppm) inheadspace Pouch (grams) 1 hour 2 hours 4 hours 8 hours 24 hours 49 hours172 hours P7 0.0997 0.288 0.287 0.306 0.326 0.295 0.550 0.802 P8 0.10100.396 0.582 0.720 0.710 0.705 0.886 1.338 P9 0.1003 0.533 0.644 0.8501.497 4.998 10.776 39.219 P10 0.1009 3.307 4.446 5.623 8.469 25.97552.703 159.8 P11 0.0504 0.088 0.126 0.403 1.780 6.855 15.775 141.000 P130.0504 0.000 0.000 0.616 5.661 31.099 70.128 220.760 P14 0.0504 0.5901.031 2.673 8.385 37.539 77.291 233.220

The concentrations of 1-MCP in TABLE 6 were normalized for the variousweights of HAIP in each pouch by dividing the measured concentration(displayed in TABLE 6) by the weight of the HAIP in the pouch (ingrams): The results are displayed in TABLE 7.

TABLE 7 Normalized concentrations of 1-MCP released into headspace,converted from the data of TABLE 6. Mean 1-MCP concentration (ppm) inheadspace per gram of particle HAIP Pouch size 1 2 4 8 24 49 172 Pouchmaterial (μm) hour hours hours hours hours hours hours P7 PET 50.5 2.892.88 3.07 3.27 2.96 5.52 8.04 P8 PET 44.9 3.92 5.76 7.13 7.03 6.98 8.7713.25 P9 PET 7.2 5.31 6.42 8.47 14.93 49.83 107.44 391.02 P10 PET 5.432.78 44.06 55.73 83.93 257.43 522.33 1583.8 P11 PP 50.5 1.75 2.50 8.0035.32 136.01 313.00 2797.6 P13 PP 7.2 0 0 12.22 112.32 617.04 1391.44380.2 P14 PP 5.4 11.71 20.46 53.04 166.4 744.82 1533.6 4627.4

In FIG. 4, the 1-MCP concentration (volume/volume) from each pouch intothe headspace is plotted against time after water injection.

The concentration of the 1-MCP (normalized for weight of complex)released into the headspace was greater from the polypropylene pouchesthan from the polyester pouches.

With a given pouch material, the concentration of the 1-MCP (normalizedfor weight of complex) released into the headspace was greater thesmaller the measured particle size of the complex.

Example 7

Four batches of alpha-cyclodextrin complex of 1-methylcyclopropene(HAIP, obtained from AgroFresh Solutions), Batch v, Batch vi, Batch vii,and Batch viii were taken. Batches v, vii, and viii had been pre-milledto a smaller particle size. Batch vi was the same batch as Batch ii inExamples 4-6. Batch vii was the same batch as Batch iv in Examples 4-6.

In addition, a blend, Batch ix, was obtained by combining a sample ofBatch v and a sample of Batch vi in a 1:1 ratio by weight.

Each of the five batches was measured for particle size distribution bylaser-diffraction analysis using a Horiba LA-950 particle size analyzer.Particle size results are given in TABLE 8.

TABLE 8 Particle size analysis of alpha-cyclodextrin/1-MCP complex Batchv Batch 

Batch vii Batch viii Batch ix Mean size 6.8 44.9 5.4 6.2 20.2 (μm)Median size 6.2 30.9 4.7 5.3 11.8 (μm) Standard 3.3 41.8 3.0 3.7 22.6deviation (μm) Mode size 7.1 27.3 4.8 5.5 12.4 (μm) Specific 114133485.9 14543 13405 7548 surface area (cm²/cm³) Diameter D05 2.5 4.7 2.02.0 2.6 on D10 3.1 8.9 2.4 2.5 3.5 cumu- D50 6.2 30.9 4.7 5.3 11.8lative D90 11.3 101.0 9.4 11.0 51.2 % (μm) D99 16.5 200.3 15.6 18.9108.4

Example 8: Analysis of Complex Batches for 1-MCP Release

Five samples of each of Batch v, Batch vi, Batch vii, and Batch viii ofthe complex from Example 7 were analyzed for 1-methylcyclopropene(1-MCP) content as follows: A sample of each batch was deposited into aseparate 250 mL Boston round bottle. To each bottle was added 3 mL ofwater, and the bottle was immediately sealed with a PTFE-coated septumand phenolic septum cap. Each bottle was shaken for one hour, duringwhich time the complex completely dissolved in the water. The headspaceof each bottle was analyzed for 1-MCP concentration, c, in parts permillion (μL/L).

The expected release of 1-MCP from Batch ix (1:1 combination by weightof complex from Batch v and complex from Batch vi was calculated fromthe average of Batch v and Batch vi. The results obtained are displayedin TABLE 9.

TABLE 9 Alpha-cyclodextrin/1-MCP complex 1-MCP release resultsConcentration Mean of 1-MCP release, normalized c, per for release 0.01Mean Measured from 0.01 grams particle Sample concentration grams of ofStandard size weight of 1-MCP complex complex deviation Sample Batch(μm)

(μL − L⁻¹) (μL − L⁻¹) (μL − L⁻¹) (μL − L⁻¹)

6.8 0.0223 1892 848.4 832 11

0.0246 2039 828.9

0.0186 1525 819.9

0.0273 2254 825.6

0.0161 1347 836.6

44.9 0.0182 1400 769.2 787 10

0.0154 1220 791.9

0.0207 1629 787.0

0.0191 1513 791.6

0.0211 1679 795.8

5.4 0.0196 1384 706.1 707 3

0.0226 1602 708.8

0.0189 1343 710.6

0.0196 1389 708.7

0.0224 1572 701.6

6.2 0.0144 994.5 690.6 685 5

0.0152 1028 676.4

0.013 892.8 686.8

0.0209 1433.4 685.8

0.0171 1172 685.6

20.2 810

Example 9: Preparation of Coating Mixtures

An overprint varnish (OPV) comprised between 1% and 2% by weight wateras measured by Karl Fisher analysis and comprised about 39.9 parts byweight of polyamide resin, about 0.2 parts by weight of ethyl acetate,about 2.8 parts by weight of heptane, about 21.2 parts by weight ofethanol, about 11.1 parts by weight of hydrotreated light naphtha (CASnumber 64742-49-0), about 11.6 parts by weight of light aliphaticsolvent naphtha (CAS number 64742-89-8), and about 13.3 parts by weightof propan-1-ol.

The overprint varnish (about 2.5 gallons) was dried using the proceduredescribed above in General Procedures. The dried overprint varnish had amoisture content of less than 0.50 wt %.

The kinematic viscosity of the overprint varnish was adjusted before useas follows: A sample of the dried overprint varnish was tested using a#3 Zahn cup (available from Cole-Parmer, 795-104). If the effluent timeexceeded 23 seconds, a small amount of diluent (described below) wasadded incrementally and mixed in until the dried overprint varnish hadan effluent time of about 23 seconds (corresponding to a kinematicviscosity of about 250 centistokes). Between 10 ml and 100 ml of diluentwas required per one gallon of overprint varnish, depending on batch andmixing conditions. The diluent comprised 80% propan-1-ol, 16% ofhydrotreated light naphtha (CAS number 64742-49-0), and 4% heptane byweight.

The mean percent solids of the dried overprint varnish (adjusted asdescribed above) was 45.94% by weight.

The overprint varnish was sealed in a pail with an airtight lid and leftovernight.

Five batches of known weight of the dried adjusted overprint varnishwere prepared as described; Batch 1, Batch 2, Batch 3, Batch 4, andBatch 5, each of which was sealed into a two-gallon bucket.

To each of Batches 1, 2, 3, 4, and 5 of dried overprint varnish wasrespectively added four parts by weight of one of Batches v, vi, vii,viii, and ix of alpha-cyclodextrin/1-MCP complex, as shown in TABLE 10.For every 96 parts by weight of the dried overprint varnish, 4 parts byweight of the alpha-cyclodextrin complex were added as follows: Atwo-gallon capacity bucket of the dried overprint varnish was mixedusing a three-inch Cowles blade at 540 rpm (revolutions per minute). Thealpha-cyclodextrin/1-MCP complex was slowly added to the dried overprintvarnish being mixed. The mixture was tested for homogeneity by dipping awooden tongue depressor into the mixture, removing the tongue depressor,and visually inspecting the mixture on the tongue depressor foragglomerations. Mixing was continued until the mixture was homogeneous,i.e. no large agglomerations were visible on the tongue depressor. Thefinal mixture comprised about 48.1 percent solids including 4 weightpercent of the complex. The final mixture was coated immediatelyfollowing mixing.

TABLE 10 Coating mixture of Example 9 Mean Batch particle number Batchsize of Coating of of Wt % of % complex composition complex OPV complexsolids (μm) I

1 4.0 48.1 6.8 II

2 44.9 III

3 5.4 IV

4 6.2 V

5 20.2

Example 10

Coating of each of Coating Compositions I, II, III, IV, and V wascarried out on a flexographic press fitted with an anilox roll of 400lines per inch and having a volume of 7.06 BCM (billions of cubicmicrons) and a 100% screen flexographic plate.

Coating was carried out at a web speed of about 200 feet per minute (61meters per minute) onto a 75 gauge film substrate (0.75 thousands of aninch thick or 19 microns thick). The treated substrate was dried in linein an impingement oven of about six feet (1.83 meters) in length set atabout 145° F. (63° C.) with a residence time of about two seconds.

Compositions I-IV were coated onto polyethylene terephthalate film.Composition V was coated onto clear coextruded oriented polypropylenefilm (T 523-3 available from Taghleef Industries).

Coatings were produced as shown in TABLE 11.

TABLE 11 Flexographic coatings of Example 10. Mean particle size ofCoating Coating Complex complex Roll Composition Batch (microns) 1 I

6.8 2 II

44.9 3 III

5.4 4 IV

6.2 5 V

20.2

Example 11

Using a paper cutter, seven rectangular samples 4 inches by 12 inches(10.2 cm by 30.5 cm) were cut from each of coating Rolls 1, 2, 3, 4, and5 from Example 10. One of the rectangular samples was labeled A, one B,one C, one D, one E, one F and one G. Each sample was individuallyplaced in a 250 mL glass Boston round bottle. Then 50 pt of deionizedwater was injected into each bottle. Care was taken so that the liquidwater did not directly contact the sample. Each bottle was then sealedwith a TEFLON® faced silicone rubber septum. Then the concentration of1-MCP was measured in the headspace at one, two, four, eight, and 24hours after the injection of water into each bottle.

Employing this method, the amount of 1-MCP released (measured asμL/L—v/v) from the printed sheets is recorded in TABLE 12 below.

TABLE 12 Release of 1-MCP from Coating Samples at room temperature (atabout 22° C.). Time after water- 1-MCP Coating Complex addition (ppmRoll Sample Batch

1 A v 1 103.9 1 B v 1 105.7 1 C v 1 126.7 1 D v 1 105.4 1 E v 1 112.6 1F v 1 106.6 1 G v 1 114.0 2 A vi 1 20.42 2 B vi 1 24.90 2 C vi 1 22.49 2D vi 1 24.59 2 E vi 1 30.43 2 F vi 1 25.38 2 G vi 1 25.02 3 A vii 1114.2 3 B vii 1 86.17 3 C vii 1 93.65 3 D vii 1 95.56 3 E vii 1 90.39 3F vii 1 95.12 3 G vii 1 73.31 4 A vii 1 85.49 4 B vii 1 79.38 4 C vii 180.82 4 D vii 1 74.95 4 E vii 1 81.20 4 F vii 1 68.43 4 G vii 1 76.70 5A ix 1 75.72 5 B ix 1 74.19 5 C ix 1 74.38 5 D ix 1 66.89 5 E ix 1 59.945 F ix 1 72.74 5 G ix 1 65.56 1 A v 2 163.8 1 B v 2 174.4 1 C v 2 192.41 D v 2 180.9 1 E v 2 161.0 1 F v 2 179.5 1 G v 2 178.4 2 A vi 2 28.95 2B vi 2 31.68 2 C vi 2 31.37 2 D vi 2 32.90 2 E vi 2 34.02 2 F vi 2 32.902 G vi 2 32.40 3 A vii 2 144.2 3 B vii 2 129.6 3 C vii 2 142.2 3 D vii 2136.6 3 E vii 2 141.8 3 F vii 2 140.6 3 G vii 2 116.2 4 A viii 2 125.6 4B viii 2 122.2 4 C viii 2 118.6 4 D viii 2 116.9 4 E viii 2 137.5 4 Fviii 2 111.2 4 G viii 2 124.0 5 A ix 2 103.6 5 B ix 2 101.1 5 C ix 2112.5 5 D ix 2 97.63 5 E ix 2 93.30 5 F ix 2 106.7 5 G ix 2 106.9 1 A v4 207.9 1 B v 4 230.9 1 C v 4 240.2 1 D v 4 239.1 1 E v 4 198.9 1 F v 4234.1 1 G v 4 221.9 2 A vi 4 33.66 2 B vi 4 36.68 2 C vi 4 37.16 2 D vi4 37.23 2 E vi 4 36.34 2 F vi 4 36.80 2 G vi 4 36.55 3 A vii 4 179.9 3 Bvii 4 168.8 3 C vii 4 189.5 3 D vii 4 179.2 3 E vii 4 191.2 3 F vii 4193.1 3 G vii 4 165.2 4 A viii 4 158.2 4 B viii 4 161.3 4 C viii 4 149.54 D viii 4 150.5 4 E viii 4 168.1 4 F viii 4 143.6 4 G viii 4 165.2 5 Aix 4 118.9 5 B ix 4 121.3 5 C ix 4 126.4 5 D ix 4 119.5 5 E ix 4 116.7 5F ix 4 121.4 5 G ix 4 126.0 1 A v 8 236.9 1 B v 8 247.6 1 C v 8 249.9 1D v 8 248.0 1 E v 8 227.0 1 F v 8 249.0 1 G v 8 242.1 2 A vi 8 36.79 2 Bvi 8 38.86 2 C vi 8 38.48 2 D vi 8 37.70 2 E vi 8 38.09 2 F vi 8 37.98 2G vi 8 38.45 3 A vii 8 200.9 3 B vii 8 192.5 3 C vii 8 211.6 3 D vii 8201.6 3 E vii 8 211.5 3 F vii 8 213.4 3 G vii 8 193.1 4 A viii 8 175.4 4B viii 8 182.0 4 C viii 8 166.2 4 D viii 8 174.7 4 E viii 8 184.9 4 Fviii 8 164.4 4 G viii 8 182.2 5 A ix 8 124.0 5 B ix 8 126.8 5 C ix 8127.7 5 D ix 8 126.7 5 E ix 8 125.2 5 F ix 8 124.8 5 G ix 8 127.2 1 A v24 247.5 1 B v 24 245.6 1 C v 24 244.9 1 D v 24 243.6 1 E v 24 244.3 1 Fv 24 246.6 1 G v 24 246.7 2 A vi 24 37.05 2 B vi 24 38.71 2 C vi 2437.83 2 D vi 24 37.07 2 E vi 24 38.06 2 F vi 24 37.61 2 G vi 24 38.30 3A vii 24 213.3 3 B vii 24 209.2 3 C vii 24 215.8 3 D vii 24 212.8 3 Evii 24 215.7 3 F vii 24 216.0 3 G vii 24 210.9 4 A viii 24 185.5 4 Bviii 24 187.5 4 C viii 24 183.6 4 D viii 24 185.7 4 E viii 24 187.0 4 Fviii 24 179.9 4 G viii 24 187.9 5 A ix 24 120.1 5 B ix 24 123.0 5 C ix24 124.6 5 D ix 24 123.6 5 E ix 24 122.4 5 F ix 24 120.2 5 G ix 24 123.4

The coating weight of the coating of Rolls 1, 2, 3, 4, and 5 wasdetermined, and is reported in TABLE 13.

TABLE 13 Coating weights of Rolls 1 to 5 Coating Weight grams per gramsper square square Roll inch meter 1 0.000768 1.190 2 0.000823 1.276 30.000799 1.238 4 0.000726 1.125 5 0.000749 1.161

The mean release for each Coating Roll is set out in TABLE 14, with thestandard deviation in parentheses and the coating weights. The value ofc for each batch of complex was obtained in Example 8 and is set forthin TABLE 9.

TABLE 14 Average 1-MCP release from coatings at room temperature (about22° C.). Mean release c of 1- MCP Mean Coating per 0.01 particle 1 2 4 824 weight, g of size of hour hours hours hours hours Coating C complexcomplex Average 1-MCP Release (μL/L) Roll (g − m⁻²) (μL/L) (μm)(Standard deviation (ppm) in parentheses) 1 1.190 832 6.8 110.7 175.8224.7 242.9 245.6 (8.0) (10.7) (16.0) (8.4) (1.4) 2 1.276 787 44.9 24.7532.03 36.35 38.05 37.81 (3.07) (1.62) (1.23) (0.67) (0.61) 3 1.238 7075.4 92.62 135.9 181.0 203.5 213.4 (12.25) (10.0) (11.0) (8.8) (2.6) 41.125 685 6.2 78.14 122.3 156.6 175.7 185.3 (5.46) (8.3) (9.0) (8.0)(2.8) 5 1.161 810 20.2 69.92 103.1 121.5 126.1 122.5 (5.88) (6.4) (3.6)(1.4) (1.7)

The amount of the complex in each 12×4 inch sample in TABLE 12 wascalculated from the coating formulation and the coating weight reportedin TABLE 13. From the amount of 1-MCP released by each batch of complex(reported in TABLE 9), the amount of 1-MCP released from the coatingscompared with the theoretical amount of 1-MCP expected from the amountof the complex present in the coatings could be calculated. In order tocalculate the theoretical release of the 1-MCP, the followingcalculations were used.

One 12 inch by 4 inch sample (48 square inches, or 0.03097 squaremeters) of coated roll gave rise to the released 1-MCP. If the coatingweight (in g/m²) is C, then the weight (M) of coating (in grams) givingrise to the 1-MCP release (from the 12×4 inch sample is given byM=0.03097·C. The weight of complex (W) in this portion of coating (ingrams) is given by W=4.0M/(44.1+4.0), therefore W=4*0.03097C/48.1,therefore W=0.002575C.

The theoretical amount (E in microliters per liter) of 1-MCP releasebased on the amount of the complex in a 0.03097 square meter sample(assuming the complex has not lost any 1-MCP during processing andcoating) is given by E=W·c/0.01, therefore E=0.002575C·c/0.01, thereforeE=0.2575C·c Accordingly, E values for each coating roll can becalculated. These are set forth with associated data from TABLE 14 inTABLE 15.

TABLE 15 Theoretical amounts of 1-MCP release from 12 × 4 inch coatingsamples, based on yield of 1-MCP in TABLE 9. Mean Coating particle 1 2 48 24 weight Complex size of hour hours hours hours hours Coating C cvalue E complex Average 1-MCP Release (μL/L) Roll (g − m⁻²) (μL/L)(μL/L) (μm) (Standard deviation (ppm) in parentheses) 1 1.190 832 254.96.8 110.7 175.8 224.7 242.9 245.6 (8.0) (10.7) (16.0) (8.4) (1.4) 21.276 787 258.6 44.9 24.75 32.03 36.35 38.05 37.81 (3.07) (1.62) (1.23)(0.67) (0.61) 3 1.238 707 225.4 5.4 92.62 135.9 181.0 203.5 213.4(12.25) (10.0) (11.0) (8.9) (2.6) 4 1.125 685 198.4 6.2 78.14 122.3156.6 175.7 185.3 (5.46) (8.3) (9.0) (8.0) (2.8) 5 1.161 810 242.2 20.269.92 103.1 121.5 126.1 122.5 (5.88) (6.4) (3.6) (1.4) (1.7)

Finally, the mean percent of the expected release of 1-MCP actuallyachieved by the coatings, T, is given by multiplying the actual releasevalues by 100/E. The values of T are set forth accordingly in TABLE 16.

TABLE 16 Percent expected 1-MCP release (at about 22° C.) from CoatingRolls 1-5. Complex 1 2 4 8 24 mean hour hours hours hours hours particleT (%) Coating size (Percent of expected 1-MCP Roll (μm) actuallyreleased) 1 6.8 43.4 69.0 88.2 95.3 96.3 2 44.9 9.6 12.4 14.1 14.7 14.63 5.4 38.1 55.8 74.4 83.6 87.7 4 6.2 39.4 61.6 79.1 88.5 93.4 5 20.228.9 42.6 50.2 52.1 50.6

The data in TABLE 16 provide comparative data to show the effect ofparticle size on the amount of 1-MCP released normalized for coatingweight variation and different amounts of 1-MCP per batch of complex.The data are plotted in FIG. 5.

At any given time after exposure to water, the percent expected releaseof 1-MCP from coatings made from cyclodextrin/1-MCP complex having meanparticle size of about 5-7 microns was greater than the percent expectedrelease from those coatings made from complex of mean particle size ofabout 20 microns, which in turn was greater than the percent expectedrelease from those coatings made from complex of mean particle size ofabout 45 microns.

Example 12

Using a paper cutter, seven rectangular samples A-G of 4 inches by 12inches (10.2 cm by 30.5 cm) were cut from each of coating Rolls 1, 2, 3,4, and 5 from Example 10.

Each sample was stored at 2° C. for about 48 hours. Each sample wasindividually placed in a 250 mL glass Boston round bottle that had beenpre-chilled to 2° C. Then 50 μL of deionized water that had beenpre-chilled to 2° C. was injected into each bottle. Care was taken sothat the liquid water did not directly contact the sample. Each bottlewas then sealed with a TEFLON® faced silicone rubber septum and thebottle was returned to storage at 2° C. The concentration of 1-MCP wasmeasured in the headspace at one, two, four, eight, and 24 hours afterthe injection of water into each bottle. The bottles were kept at 2° C.over this time. The concentration of the 1-MCP in the headspace gas wasmeasured. The amount of 1-MCP released (measured as μL/L—v/v) from theprinted sheets is recorded in TABLE 17 below.

TABLE 17 Release of 1-MCP from Coating Samples at 2° C. Time 1-MCP afterRelease water- at 2° C. Coating Complex addition (ppm Roll Sample Batch

1 A v 1 39.35 1 B v 1 20.72 1 C v 1 39.75 1 D v 1 29.95 1 E v 1 36.36 1F v 1 32.17 1 G v 1 42.48 2 A vi 1 8.499 2 B vi 1 7.777 2 C vi 1 8.726 2D vi 1 9.563 2 E vi 1 5.278 2 F vi 1 13.16 2 G vi 1 10.96 3 A vii 122.41 3 B vii 1 35.33 3 C vii 1 28.18 3 D vii 1 26.87 3 E vii 1 31.11 3A vii 2 34.43 3 B vii 2 45.82 3 C vii 2 36.97 3 D vii 2 34.94 3 E vii 236.53 3 F vii 2 34.13 3 G vii 2 23.10 4 A viii 2 32.92 4 B viii 2 31.794 C viii 2 37.87 4 D viii 2 34.60 4 E viii 2 39.33 4 F viii 2 22.07 4 Gviii 2 36.11 5 A ix 2 23.95 5 B ix 2 22.10 5 C ix 2 17.49 5 D ix 2 18.595 E ix 2 36.45 5 F ix 2 17.30 5 G ix 2 22.84 1 A v 4 87.40 1 B v 4 70.301 C v 4 91.02 1 D v 4 82.47 1 E v 4 84.76 1 F v 4 72.80 1 G v 4 75.18 2A vi 4 14.89 2 B vi 4 18.77 2 C vi 4 17.32 2 D vi 4 17.57 2 E vi 4 12.632 F vi 4 20.31 2 G vi 4 19.66 3 A vii 4 50.83 3 B vii 4 61.22 3 C vii 459.95 3 D vii 4 56.70 3 E vii 4 66.08 3 F vii 4 52.19 3 G vii 4 42.12 4A viii 4 50.45 4 B viii 4 46.96 4 C viii 4 54.33 4 D viii 4 43.38 4 Eviii 4 51.45 4 F viii 4 — 4 G viii 4 43.91 5 A ix 4 41.38 5 B ix 4 34.115 C ix 4 27.65 5 D ix 4 29.64 5 E ix 4 41.47 5 F ix 4 23.73 5 G ix 426.95 1 A v 8 95.16 1 B v 8 96.56 1 C v 8 108.0 1 D v 8 100.1 1 E v 8103.0 1 F v 8 83.86 1 G v 8 82.32 2 A vi 8 16.07 2 B vi 8 21.90 2 C vi 818.65 2 D vi 8 18.14 2 E vi 8 15.65 2 F vi 8 21.54 2 G vi 8 22.96 3 Avii 8 57.06 3 B vii 8 61.87 3 C vii 8 50.50 3 D vii 8 56.85 3 E vii 865.67 3 F vii 8 52.66 3 G vii 8 49.60 4 A viii 8 52.87 4 B viii 8 57.834 C viii 8 60.71 4 D viii 8 57.36 4 E viii 8 63.26 4 F viii 8 61.55 4 Gviii 8 56.26 5 A ix 8 48.02 5 B ix 8 40.50 5 C ix 8 35.24 5 D ix 8 38.175 E ix 8 45.85 5 F ix 8 28.72 5 G ix 8 34.27 1 A v 24 116.0 1 B v 24118.6 1 C v 24 131.6 1 D v 24 129.2 1 E v 24 120.6 1 F v 24 102.1 1 G v24 99.60 2 A vi 24 20.12 2 B vi 24 22.62 2 C vi 24 22.56 2 D vi 24 21.942 E vi 24 19.60 2 F vi 24 23.57 2 G vi 24 25.01 3 A vii 24 71.63 3 B vii24 63.16 3 C vii 24 76.54 3 D vii 24 56.82 3 E vii 24 69.58 3 F vii 2455.24 3 G vii 24 61.51 4 A viii 24 61.80 4 B viii 24 59.82 4 C viii 2459.69 4 D viii 24 60.82 4 E viii 24 66.51 4 F viii 24 62.76 4 G viii 2454.43 5 A ix 24 65.93 5 B ix 24 50.90 5 C ix 24 45.39 5 D ix 24 44.41 5E ix 24 51.02 5 F ix 24 36.77 5 G ix 24 40.50

From the values in TABLE 17 were calculated the expected (E) values,which latter values are set forth in TABLE 18. The calculations weredone using the methods set forth in Example 11.

TABLE 18 Average 1-MCP release from coatings at 2° C. Complex 1 2 4 8 24Coating Complex mean hour hours hours hours hours Coating weight c valueE particle Average 1-MCP Release/ppm Roll (g − m⁻²) (μL/L) (μL/L) size(μm) (Standard deviation/ppm in parentheses) 1 1.190 832 254.9 6.8 34.4056.92 80.56 95.57 116.82 (7.46) (9.92) (7.88) (9.52) (12.27) 2 1.276 787258.6 44.9 9.14 12.65 17.31 19.27 22.20 (2.48) (2.52) (2.72) (2.91)(1.88) 3 1.238 707 225.4 5.4 27.15 35.13 55.58 57.74 64.93 (5.78) (6.66)(7.93) (5.49) (7.91) 4 1.125 685 198.4 6.2 21.18 32.67 48.41 58.55 60.83(6.34) (5.38) (4.38) (3.54) (3.66) 5 1.161 810 242.2 20.2 12.27 22.6732.13 38.68 47.84 (8.45) (6.64) (7.08) (6.74) (9.49)

Finally, from the values in TABLE 18 were calculated the T values, whichlatter are set forth in TABLE 19. The calculations were done using themethods set forth in Example 11.

TABLE 19 Percent theoretical 1-MCP release (2° C. measurements) 1 2 4 824 Complex hour hours hours hours hours mean T (%) Coating particle(Percent of expected 1-MCP Roll size/μm actually released) 1 6.8 13.522.3 31.6 37.5 45.8 2 44.9 3.5 4.8 6.7 7.5 8.6 3 5.4 12.0 15.6 24.7 25.628.8 4 6.2 10.7 16.5 24.4 29.5 30.7 5 20.2 5.1 9.4 13.3 16.0 19.8

The data in TABLE 19 provide comparative data to show the effect ofparticle size on the amount of 1-MCP released at 2° C., where therelease is normalized for coating weight variation and different amountsof 1-MCP per batch of complex. The data are plotted in FIG. 6.

At any given time after exposure to water, the percent expected releaseof 1-MCP from coatings made from cyclodextrin/1-MCP complex having meanparticle size of about 5-7 microns was greater than the percent expectedrelease from those coatings made from complex of mean particle size ofabout 20 microns, which in turn was greater than the percent expectedrelease from those coatings made from complex of mean particle size ofabout 45 microns.

Example 13

Each of five petrolatum compositions, Compositions VI, VII, VIII, IX,and X, is formed by immersing a container having a known weight ofpetrolatum (VASELINE®, melting point 38-56° C., obtained from SigmaAldrich Corporation of St. Louis, Mo.) in a water bath at 70° C. untilliquefied, and mechanically dispersing 4 wt % of an alpha-cyclodextrincomplex of 1-methylcyclopropene (HAIP, obtained from AgroFreshSolutions) into the liquefied petrolatum using low shear mixing. Asshown in TABLE 20, each composition is made with a different batch ofcomplex, and each of the five petrolatum-based cyclodextrin compositionsis individually applied to a continuously moving flexible web usingflexographic printing methodology to produce five treated laminates asdescribed below. The batches of complex used are the same as thosedescribed in Examples 7 and 8.

TABLE 20 Petrolatum coatings Mean Mean release, particle c, per 0.01size of grams of Treated

Complex complex complex Laminate

Batch

(μL − L⁻¹) 6 VI

6.8 832 7 VII

44.9 787 8 VIII

5.4 707 9 IX

6.2 685 10 X

20.2 810

Flexographic printing is carried out using a narrow web rotary printingpress (340 mm wide flexographic press obtained from Gallus Inc. ofPhiladelphia, Pa.). Flexible plates made of engineered photopolymer andhaving a raised discontinuous diamond relief pattern covering 40% of theplate surface area are adhered to the plate cylinder. The film substrateused for printing is a high barrier film (EXXON MOBIL® BICOR® 210 ASB-X,acrylic and polyvinyldene chloride coated oriented polypropylene, 33 cmwide, obtained from the EXXON MOBIL® Corporation of Irving, Tex.). Thefountain trough is loaded with one of the petrolatum compositions,Composition VI, VII, VIII, IX, or X. Hot air is blown over the fountainroll to keep the petrolatum composition liquefied. The liquefiedpetrolatum composition is applied to the photopolymer plate using ananilox roll. The printing press is run at 100 to 150 ft/min (30.5 to45.7 m/min). The printed petrolatum composition is then ‘hard-set’ usinga chill roll filled with dry ice pellets. Then the entire web surface iscoated inline with a UV lamination adhesive (RAAL00160/1060DHV UV/EBCurable Adhesive, obtained from ACTEGA WIT, Inc. of Lincolnton, N.C.)coated via flexographic printing, using a 500 lines/in (197 lines/cm,5.02bcm) anilox roll before joining a second substrate to the adhesive.The second substrate is a 1 mil (25.4 μm) thick, low densitypolyethylene (LDPE) web (MI=1.8 g/10 min, density 0.921 g/ml, Vicatsoftening point 100° C.) which is applied at a nip, and radiation curingof the adhesive is carried out using UV lamps mounted immediately afterthe nip point to prevent separation or air pockets in the laminatedfilm. Curing is accomplished with a 300 watt/inch lamp. The completedTreated Laminate Roll, a treated laminate containing one of CompositionsVI, VII, VIII, IX, or X printed in a diamond pattern, is wound up.

In this manner, each of Petrolatum Compositions VI, VII, VIII, IX, and Xis disposed between the two substrate layers of Treated Laminates 6, 7,8, 9, and 10 respectively, wherein direct substrate-adhesive-substratecontact in the interstitial areas provided by the diamond patterneffectively isolates the Petrolatum Composition into “islands”. Theisolated islands of the cyclodextrin composition provide for ease ofwindup, storage, and use. Further, when placed in a container having anitem of produce also contained therein, the Petrolatum Composition willnot contact the produce directly. No petrolatum can contact with thepackaged food, and no petrolatum migration is possible.

Three 10 cm×30.5 cm rectangular samples are cut from each of TreatedLaminates 6-10. Each sample is loosely rolled up and placed into aseparate clean 250 mL bottle for testing according to the analyticaltest method used in Example 11. Each bottle is injected with 50 μL ofdeionized water. Care is taken so that the liquid water does notdirectly contact the film. Bottle headspace is analyzed for 1-MCP atfour time periods; 2, 22, 44, and 72 hours after the injection of water.The average headspace concentration of 1-MCP for each of the threesamples is tabulated in TABLE 21.

Mean particle sizes were measured in Example 7 and mean release per 0.01g of complex (c) was measured in Example 8.

TABLE 21 1-MCP release from petrolatum treated laminate samples MeanAverage amount of 1-MCP released, release, Mean average three samplesafter t hours Batch

particle (μL/L) of 0.01 g of size of Treated t = 2 t = 22 t = 44 t = 72com- complex complex laminate hours hours hours hours plex (μL/L)

6 3.2 116.4 135.1 133.7 v 832 6.8 7 0.5 16.7 19.4 19.2 vi 787 44.9 8 2.190.1 103.5 104.6 vii 707 5.4 9 2.3 93.0 106.8 107.9 viii 685 6.2 10 1.959.6 69.1 68.4 ix 810 20.2

The average release per 0.01 g of complex for all five batches was 7644/L. Normalizing for the different amount of 1-MCP in each batch bymultiplying by 764/c gives the results in TABLE 22.

TABLE 22 1-MCP release from petrolatum treated laminate samples,normalized for complex batch variability Amount of 1-MCP released aftert hours Mean normalized for complex batch variability particle (μL/L)size of Treated t = 2 t = 22 t = 44 t = 72 complex laminate hours hourshours hours

6 2.9 106.9 124.1 122.8 6.8 7 0.5 16.2 18.8 18.6 44.9 8 2.3 97.4 111.8113.0 5.4 9 2.6 103.7 119.1 120.3 6.2 10 1.8 56.2 65.2 64.5 20.2

At any given time after exposure to water, the normalized release of1-MCP from the treated laminate samples made from cyclodextrin/l-MCPcomplex having mean particle size of about 5-7 microns is greater thanthe normalized release from those treated laminate samples made fromcomplex of mean particle size of about 20 microns, which in turn isgreater than the normalized release from those treated laminate samplesmade from complex of mean particle size of about 45 microns.

Example 14

A 20 mL bottle is charged with 9.8 g of UV Coating VP 10169/60 MF-2NE(obtained from Verga GmbH of Aschau am Inn, Germany) and 0.2 g of analpha-cyclodextrin/1-MCP complex. The 20 mL bottle is firmly capped andthe components are mixed by shaking the bottle by hand until uniformlydispersed, resulting in a UV-curable blend comprising 2 wt % of thealpha-cyclodextrin/1-MCP complex.

A portion of the mixture is removed from the bottle with a dropper anddispensed on a glass pan. A rubber ink roller is used to spread themixture on the glass and roller. Next, the roller is used to coat themixture on the coated side of a 20 cm by 20 cm section of polyethyleneextrusion coated paper (REYNOLDS® Freezer Paper, 90 microns totalthickness). A razor blade is used to cut a 5 cm by 10 cm rectangle fromthe coated portion of the sheet. Then the coated cut rectangle is passedby hand about 10 cm beneath a medium pressure mercury arc lamp operatingat 200 watts per inch (79 watts per cm). After 1.5 seconds exposure tothe lamp, the cured rectangle is removed. The cured rectangle is allowedto sit on a laboratory bench overnight coating side down. Six replicatecoated rectangles of each formulation are made in this fashion.

The above procedure is carried out for each of the five batches of HAIPdescribed in Examples 7 and 8; Batch v, Batch vi, Batch vii, Batch viii,and Batch ix. Accordingly, 30 rectangles, six made from each batch ofcomplex, are made.

Each rectangle is placed in a 250 mL serum bottle. Then the 30 bottlesare sealed with TEFLON® faced silicone septa. The 1-MCP headspaceconcentration in each serum bottle is quantified using gaschromatography by removing 250 μL of gas from the serum bottle using asix port, two-position gas sampling valve interfaced directly to the GCcolumn having FID detector. No measurable concentration of 1-MCP isdetected in the headspace of any of the serum bottles.

Then 50 μL of deionized water is injected into each bottle. Care istaken so that the liquid water does not directly contact the coatedrectangle. The headspace of each of the 30 sealed serum bottles isanalyzed at 1, 2, 4, 8, 24, and 96 hours after the injection of water,wherein about 3 mL of the 250 mL bottle headspace volume is removed foreach analysis. In each sampling, the amount of 1-MCP released from theUV coated rectangles is quantified by gas chromatography against a6-point 1-butene calibration curve having a 0.998 correlationcoefficient. TABLE 23 illustrates the average of six replicate samplesof 1-MCP headspace concentration for each Batch.

TABLE 23 1-MCP release from UV-cured coatings t (hours) Batch v Batch viBatch vii Batch viii Batch ix 1-MCP t = 1 7.4 1.5 5.5 5.5 4.8 releasedhour (μL/L) t = 2 18.2 3.1 12.5 13.4 10.9 after hours time t t = 4 33.45.0 23.9 24.6 18.5 hours t = 8 47.8 6.2 36.2 36.9 24.6 hours t = 24 54.67.8 42.3 43.6 28.0 hours t = 96 56.0 8.0 43.4 44.7 28.7 hours Meanrelease, 832 787 707 685 810 c, per 0.01 g of complex (μL/L) Meanparticle 6.8 44.9 5.4 6.2 20.2 size of complex

The average release per 0.01 g of complex for all five batches was 7644/L. Normalizing for the different release from the different batches bymultiplying by 764/c gives the results in TABLE 24.

TABLE 24 1-MCP release from UV-cured coatings, normalized for complexbatch variability t (hours) Batch v Batch

Batch vii Batch viii Batch ix 1-MCP t = 1 6.8 1.5 6.0 6.1 4.5 releasedhour (μL/L) t = 2 16.7 3.0 13.5 14.9 10.2 after hours time t t = 4 30.74.9 25.8 27.4 17.4 hours t = 8 43.9 6.0 39.1 41.1 23.2 hours t = 24 50.17.6 45.7 48.6 26.4 hours t = 96 51.3 7.8 46.8 49.8 27.0 hours Meanparticle 6.8 44.9 5.4 6.2 20.2 size of compex

At any given time after exposure to water, the normalized release of1-MCP from coatings made from cyclodextrin/1-MCP complex having meanparticle size of about 5-7 microns is greater than the normalizedrelease from those coatings made from complex of mean particle size ofabout 20 microns, which in turn is greater than the normalized releasefrom those coatings made from complex of mean particle size of about 45microns.

Example 15

A new electrostatic printing toner cartridge (Brother TN-225Yreplacement yellow toner cartridge, obtained from Brother InternationalCorp. of Bridgewater, N.J.) is emptied by cutting a 17 mm filling holeusing a tool that melts a ring into the toner cartridge and collectingthe free-flowing toner in a tared 6 oz. HDPE plastic bottle. Afteremptying the cartridge, the hole is resealed. Then 25 grams ofX-Generation® yellow toner no. 18532 (yellow replacement toner obtainedfrom 123Toner.com) is added to a 6.5 oz. polyester beaker, then 2.8 wt %of HAIP alpha-cyclodextrin/1-MCP complex is added to the yellow tonermaterial slowly while mixing. This mixture is mixed for one hour usingthe technique described in U.S. Pat. No. 6,599,673 using a mixing bladesimilar to FIG. 5 in that patent. Following the mixing/blending process,the toner is returned to the cartridge via the aforementioned hole.After refilling the cartridge, it is gently shaken side to side todistribute the toner mixture.

The refilled cartridge is mounted in a Brother MFC-9340 CDW lasermulti-function color copier (obtained from the Brother InternationalCorp. of Bridgewater, N.J.) according to the manufacturer's directions.The copier thus refitted is referred to as the modified copier.

A solid yellow continuous rectangle image having a total printable areaof 20 cm×26.4 cm and having a maximum yellow density is designed on acomputer using MICROSOFT® Excel software. The image is then printed ontostandard photocopier paper using a HP Laser Jet 5550dn (obtained fromthe Hewlett-Packard Company of Palo Alto, Calif.). This is referred toas 100% printed paper.

A second image consisting of a maximum yellow density diamond patternhaving overall dimensions of 20 cm×26.4 cm but representing 50% of totalyellow area of the image of the 100% image is designed on a computerusing MICROSOFT® Excel software. The image is then printed onto standardphotocopier paper using a HP Laser Jet 5550dn (obtained from theHewlett-Packard Company of Palo Alto, Calif.). This is referred to as a50% printed paper.

The 100% printed paper is placed onto the Brother MFC-9340 CDW copierimage scanner glass. The modified printer settings were set to print to“plain paper”, print emulation of “HP LaserJet”, and a paper setting of“thin paper”.

The modified copier is loaded with plain white copy paper (Boise copierpaper, 20 lb.), and then six paper sheets are printed with the scannedimage and discarded. Then two additional sheets are printed and kept fortesting. Then the printer is loaded with polyester film (8.5″×11″×110 μmthick, obtained from the ACCO Brands of Zurich, Ill.) and two filmsheets are printed and kept for testing. Fuser temperature measurementsare acquired during printing, and are shown in TABLE 25.

A paper cutter is used to cut two replicate 7.6 cm by 20.3 cm rectanglesfrom each of the two paper sheets and each of the two transparency filmsheets. The samples are individually placed in 250 mL glass serumbottles. Then 200 μL of deionized water is injected into each bottle.Care is taken so that the liquid water does not directly contact thesample sheets. The bottles are then sealed with TEFLON® faced siliconerubber septa. Then 1-MCP is measured in the headspace at about 1, 2, 4,8, 24 and 96 hours after the injection of water into the bottle byremoving 250 μl of headspace gas using a six port, two-position gassampling valve (Valco #EC6W, obtained from Valco Instruments Inc. ofHouston, Tex.) interfaced directly to a gas chromatograph (GC; HewlettPackard 5890, obtained from the Hewlett Packard Company of Palo Alto,Calif.) using a RTx-5 GC column, 30 m×0.25 mm I.D., 0.25 μm film(obtained from Restek, Inc., of Bellefonte, Pa.) equipped with a flameionization detector (FID) and quantitated against a 6-point 1-butene(99.0% pure, Scott Specialty Gases, Plumsteadville, Pa.; also known asAir Liquide America Specialty Gases LLC) calibration curve.

Next, the 50% printed paper was placed onto the Brother MFC-9340 CDWcopier image scanner glass and the scanning, printing, cutting, andheadspace analysis procedures employed for the 100% image were repeatedusing the 50% image.

The above procedure is carried out for each of the HAIP Batches v, vi,vii, viii, and ix (described in Examples 7 and 8).

The average 1-MCP release of the two paper replicates at 100% areaprinting and at 50% area printing at one hour, two hours, four hours,eight hours, and 24 hours results for each of the complex batches isreported in TABLE 25.

TABLE 25 Release of 1-MCP from the printed paper samples of Example 15Fuser Batch Temp % Print 1 Hr 2 Hr 4 Hrs 8 Hrs 24 Hrs of (° C.) CoverageμL/L μL/L μL/L μL/L μL/L complex 170 100 0.64 1.15 1.98 3.46 10.78 v0.13 0.20 0.30 0.50 1.55 vi 0.48 0.79 1.42 2.58 8.34 vii 0.46 0.82 1.422.57 8.37 viii 0.41 0.69 1.09 1.84 5.52 ix 165  50 0.25 0.42 0.82 1.342.37 v 0.05 0.07 0.12 0.20 0.34 vi 0.18 0.29 0.59 1.00 1.84 vii 0.180.31 0.6 1.03 1.89 viii 0.16 0.26 0.45 0.71 1.21 ix

The average release per 0.01 g of complex for all five batches was 764μL/L. Normalizing for the different release from the different batchesby multiplying by 764/c gives the results in TABLE 26.

TABLE 26 Normalized release of 1-MCP from the printed paper samples ofExample 15 Fuser Batch Temp % Print 1 Hr 2 Hr 4 Hrs 8 Hrs 24 Hrs of (°C.) Coverage μL/L μL/L μL/L μL/L μL/L complex 175 100 0.59 1.06 1.823.18 9.90 v 0.13 0.19 0.29 0.49 1.50 vi 0.52 0.85 1.53 2.79 9.01 vii0.51 0.91 1.58 2.87 9.34 viii 0.38 0.65 1.03 1.74 5.21 ix 165  50 0.230.39 0.75 1.23 2.18 v 0.05 0.07 0.12 0.19 0.33 vi 0.19 0.31 0.64 1.081.99 vii 0.20 0.35 0.67 1.15 2.11 viii 0.15 0.24 0.42 0.67 1.14 ix

At any given time after exposure to water, the normalized release of1-MCP from prints made from cyclodextrin/1-MCP complex having meanparticle size of about 5-7 microns is greater than the normalizedrelease from those prints made from complex of mean particle size ofabout 20 microns, which in turn is greater than the normalized releasefrom those prints made from complex of mean particle size of about 45microns. This is the case for both 100% printed area and for 50% printedarea on paper.

The average 1-MCP release of the two film replicates at 100% areaprinting and at 50% area printing at one hour, two hours, four hours,eight hours, and 24 hours results for each of the complex batches isreported in TABLE 27.

TABLE 27 Normalized release of 1-MCP from the printed film samples ofExample 15 Fuser Batch Temp % Print 1 Hr 2 Hr 4 Hrs 8 Hrs 24 Hrs of (°C.) Coverage μL/L μL/L μL/L μL/L μL/L complex 175 100 1.28 4.18 5.739.88 14.37 v 0.27 0.71 0.86 1.44 2.06 vi 0.96 2.87 4.10 7.37 11.12 vii0.96 3.07 4.22 7.56 11.48 viii 0.83 2.52 3.17 5.25 7.36 ix 165  50 0.441.33 2.86 4.52 6.04 v 0.09 0.23 0.43 0.66 0.87 vi 0.33 0.92 2.05 3.374.67 vii 0.37 0.98 2.11 3.45 4.82 viii 0.29 0.80 1.62 2.42 3.09 ix

The average release per 0.01 g of complex for all five batches was 7644/L. Normalizing for the different release from the different batches bymultiplying by 764/c gives the results in TABLE 28.

TABLE 28 Normalized release of 1-MCP from the printed film samples ofExample 15 Mean Batch particle Fuser of size of Temp % Print 1 Hr 2 Hr 4Hrs 8 Hrs 24 Hrs com- complex (° C.) Coverage μL/L μL/L μL/L μL/L μL/Lplex (microns) 175 100 1.18 3.84 5.26 9.07 13.20 v 6.8 0.26 0.69 0.831.40 2.00 vi 44.9 1.04 3.10 4.43 7.96 12.02 vii 5.4 1.07 3.42 4.71 8.4312.80 viii 6.2 0.78 2.38 2.99 4.95 6.94 ix 20.2 165  50 0.40 1.22 2.634.15 5.55 v 6.8 0.09 0.22 0.42 0.64 0.84 vi 44.9 0.36 0.99 2.22 3.645.05 vii 5.4 0.41 1.09 2.35 3.85 5.38 viii 6.2 0.27 0.75 1.53 2.28 2.91ix 20.2

At any given time after exposure to water, the normalized release of1-MCP from prints made from cyclodextrin/1-MCP complex having meanparticle size of about 5-7 microns is greater than the normalizedrelease from those prints made from complex of mean particle size ofabout 20 microns, which in turn is greater than the normalized releasefrom those prints made from complex of mean particle size of about 45microns. This is the case for both 100% printed area and for 50% printedarea on film.

1.-15. (canceled)
 16. A coated substrate comprising a coating disposedon a substrate surface, the coating comprising a composition consistingessentially of a 1-methylcyclopropene clathrate of α-cyclodextrin andhaving a mean particle size between 3 μm and 15 μm as determined by avolume-based method; and a polymer.
 17. The coated substrate of claim 1wherein the composition consists of the 1-methylcyclopropene clathrateof α-cyclodextrin, 0-15 wt % α-cyclodextrin, and 0-1 ppm by weight of1-chloromethylpropene, 3-chloromethylpropene, or a combination thereof.18. The coated substrate of claim 1 wherein the clathrate mean particlesize is between 3 μm and 10 μm.
 19. The coated substrate of claim 1wherein the polymer is selected from poly(alpha hydroxy acids),polysaccharides, chemically modified polysaccharides, polyamides,polyolefins, thermoplastic polyurethanes, polyureas, polyacrylates,polystyrenes, polyesters, polybutadienes, polysiloxanes,polyalkylsilanes, polyvinyl halides, polyvinylidene halides,polyacrylonitriles, polycarbonates, polyethers, polyglycerols,polyethylene imines, nucleic acids, poly(phenylene oxide)s,polymethacrylamides, poly(N-alkylacrylamides), poly(divinyl ether),polyvinyl acetate, polyvinyl alcohol and copolymers thereof, furan resin(poly(2-furanmethanol)), polyhydroxyalkanoates, polyindole, orpolymethacrylonitrile, polyvinyl butyral, vinyl formal vinyl acetatecopolymer, styrene acrylate copolymer, styrene divinyl benzenecopolymer, polyester resin, styrene butadiene copolymer, or anycombination thereof.
 20. The coated substrate of claim 1 wherein thepolymer comprises nitrocellulose, a polyamide, or a combination thereof.21. The coated substrate of claim 1 wherein the coated substratecomprises 0.1 g/m² to 100 g/m² of the coating disposed on the substratesurface.
 22. The coated substrate of claim 1 wherein the substratecomprises a thermoplastic sheet or film, or a woven or nonwoven fabricor paper.
 23. The coated substrate of claim 1 wherein the substratecomprises a web, the web comprising top and bottom major surfacesdefining a thickness of about 10 microns to 1000 microns therebetween.24. The coated substrate of claim 1 wherein the substrate comprises apoly(vinyl chloride), a polyvinylidene halide, a polyolefin, apolyester, a polystyrene, a polyvinyl alcohol, an ethylene-vinylacetate, or a copolymer, blend, alloy, or composite of thereof.
 25. Thecoated substrate of claim 1 wherein the substrate is perforated, meshed,foamed, woven, or nonwoven.
 26. The coated substrate of claim 1 whereinthe substrate is permeable to water vapor, permeable to1-methylcyclopropene, or permeable to both water vapor and1-methylcyclopropene.
 27. The coated substrate of claim 1 wherein thecoating is between 0.1 micron and 50 microns thick on all or a portionof the coated substrate surface.
 28. A coating composition comprising amixture of a polymer, a solvent, and a particulate consistingessentially of a 1-methylcyclopropene clathrate of α-cyclodextrin andhaving a mean particle size between 3 μm and 15 μm as determined by avolume-based method.
 29. The coating composition of claim 13 wherein thecomposition comprises 0.001 g/L and 500 g/L of the particulate based onthe volume of the coating composition.
 30. The coating composition ofclaim 13 wherein the composition comprises 1 wt % to 80 wt % of thepolymer based on the weight of the composition.
 31. The coatingcomposition of claim 13 wherein the solvent is selected from ketones,esters, aldehydes, ketals, acetals, hydrocarbon solvents, amides,ethers, polyols, alcohols, or combinations thereof.
 32. The coatingcomposition of claim 13 wherein the coating composition includes 2 wt %or less of water.